Tag: us geological survey

Earthquake swarm strikes San Ramon area Friday night

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SAN RAMON — A cluster of earthquakes struck the San Ramon area Friday night, continuing a pattern of seismic activity in recent weeks, according to the U.S. Geological Survey.

Things kicked off at 7:41 p.m. with a magnitude 2.5 centered 3.1 miles southeast of the city.

It was followed by a pair of quakes at 7:49 p.m. – a magnitude 2.9 and a magnitude 3.8. The earthquakes were centered 3.1 miles and 2.4 miles, respectively, southeast of the city.

The biggest of the bunch – a magnitude 4.0 – hit at 7:56 p.m. 3.1 miles southeast of the city.

The earthquake swarm continued with a magnitude 3.1 at 7:57 p.m. and a magnitude 2.9 at 8:10 p.m. – the temblors were centered about 2.4 miles southeast of the city.

There were no immediate reports of injuries of damage, but BART ran trains at reduced speeds until it completed safety inspections, resulting in a 20-minute delay.

Regular train service resumed just before 8:45 p.m., according to the transit agency.

Check back for updates.

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Jason Green

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December 19, 2025
Magnitude 3.0 quake jolts South Santa Clara County

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MORGAN HILL – A magnitude 3.0 earthquake jolted South Santa Clara County Tuesday night, according to the U.S. Geological Survey.

The quake hit around 5:48 p.m. about 9.9 miles east of Seven Trees, 10.7 miles north of Morgan Hill and 10.8 miles east-southeast of Alum Rock, the USGS reported.

There were no immediate reports of injuries or damage.

The earthquake happened along the seismically active Calaveras Fault, which has produced notable quakes, including a magnitude 6.2 in 1984 and a magnitude 5.9 in 1979.

The Bay Area has seen other quake activity in the past 10 days, including a swarm of more than 80 temblors in the San Ramon area. Six, including one late Monday night at 10:47 p.m., were 3.0 or above – generally large enough for most people to feel.

Check back for updates.

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Jason Green

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November 18, 2025
Magnitude 3.3 earthquake rattles East Bay

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SAN RAMON – A magnitude 3.3 earthquake rattled the East Bay late Monday night, according to the U.S. Geological Survey.

The quake struck around 10:47 p.m. about 2.4 miles southeast of San Ramon, the USGS reported.

There were no immediate reports of injuries or damage.

The earthquake was felt as far away as Oakland, Union City and Dublin, according to the USGS.

Check back for updates.

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Jason Green

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November 17, 2025
2.5-magnitude earthquake shakes Howard County – WTOP News

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A 2.5-magnitude earthquake shook Howard County, Maryland, on Monday evening, according to the U.S. Geological Survey.

A 2.5-magnitude earthquake shook Howard County, Maryland, on Monday evening, according to the U.S. Geological Survey.

The quake happened at about 5:17 p.m. in Columbia at a depth of nearly 5 miles. It was reportedly felt in D.C. and Arlington, Virginia. It was felt as far south as Waldorf, Maryland, and as far north as Owings Mills.

Someone even reported feeling the quake across the Chesapeake Bay in the Easton, Maryland, area.

Tina Laboy, deputy director at the Howard County Office of Emergency Management, joined WTOP’s Nick Iannelli on Monday night, describing worried calls her office received about the reported earthquake.

She said their first step was to gather “as much information as we can about the incident.”

“Once we had reports of the boom and the shaking, our police department, our fire department, had crews out in the community surveying for damage,” Laboy said. “When we got that notification from the U.S. Geological Survey, that put it into perspective of what types of damages we might have been looking for.”

She said the county is monitoring the potential for aftershocks and reminded residents to “remain vigilant just in case.”

The exact epicenter of the earthquake is right next to Hopewell Park in Columbia.

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Thomas Robertson

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October 27, 2025
Hawaii’s Kilauea volcano erupts with lava pouring out from multiple vents

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Hawaii’s Kilauea volcano erupts with lava pouring out from multiple vents

Updated: 12:44 AM EDT Sep 3, 2025

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Hawaii’s Kilauea volcano resumed erupting on Tuesday, firing lava 330 feet into the sky from its summit crater.It’s the 32nd time the volcano has released molten rock since December, when its current eruption began. So far, all the lava from this eruption has been contained within the summit crater inside Hawaii Volcanoes National Park.Lava emerged from the north vent in Halemaumau Crater after midnight. The vent began shooting fountains of lava at 6:35 a.m., the U.S. Geological Survey said. By mid-morning, it was also erupting from the crater’s south vent and a third vent in between.Kilauea is one of the world’s most active volcanoes. It’s located on Hawaii Island, the largest of the Hawaiian archipelago. It’s about 200 miles south of the state’s largest city, Honolulu, which is on Oahu.

(Video: USGS via CNN Newsource) —

Hawaii’s Kilauea volcano resumed erupting on Tuesday, firing lava 330 feet into the sky from its summit crater.

It’s the 32nd time the volcano has released molten rock since December, when its current eruption began. So far, all the lava from this eruption has been contained within the summit crater inside Hawaii Volcanoes National Park.

Lava emerged from the north vent in Halemaumau Crater after midnight. The vent began shooting fountains of lava at 6:35 a.m., the U.S. Geological Survey said. By mid-morning, it was also erupting from the crater’s south vent and a third vent in between.

Kilauea is one of the world’s most active volcanoes. It’s located on Hawaii Island, the largest of the Hawaiian archipelago. It’s about 200 miles south of the state’s largest city, Honolulu, which is on Oahu.

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September 2, 2025
Rare 4.8-magnitude earthquake leaves little damage after rattling Northeast

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New York (CNN) — A 4.8 magnitude earthquake rattled buildings across parts of the Northeast Friday morning, according to the US Geological Survey, with tremors felt from Washington, DC to New York City to Maine.

It was the third largest earthquake recorded in the area in the last five decades and the strongest in New Jersey in more than 240 years, the USGS said. The rare quake was felt by millions of people across hundreds of miles, disrupting work and school life and jolting nerves momentarily before an early spring day seemed to return to normal.

In a region unaccustomed to earthquakes, stunned residents across large swaths of the Northeast described initially thinking of a passing tractor trailer or freight train before realizing it was something more. With authorities reporting little or no damage, and minimal travel disruptions, people soon resumed their everyday lives.

“At first I thought it was a big truck driving down a nearby road or the oil burner shaking inside my house,” said Jeanne Evola, who described her whole house shaking in Franklin Square on Long Island.

She ran outside as the quake intensified. She found her neighbors describing the same rattling, realizing they had experienced an earthquake in a suburb about 20 miles east of New York City.

The New York Police Department said there were no damages or injuries reported.

“New Yorkers should go about their normal day,” New York Mayor Eric Adams said at a news briefing later Friday.

USGS said the earthquake occurred at 10:23 a.m. The New York City Fire Department said the department received reports of shaking buildings about 10:30 a.m.

“We are responding to calls and evaluating structural stability,” the department said in a statement. “There are no major incidents at this time.”

In some parts of the New York City area, startled residents spilled out from tenements and row houses onto the sidewalks in front of their buildings in the minutes after the shaking stopped.

“Everything started vibrating then I felt the building shake,” said David Rodriguez, a resident of Hoboken, New Jersey. “I thought it was a large truck outside until everything started swaying. But it had that sound of something swaying from side to side.”

The X account for the Empire State Building posted: “I AM FINE.”

Long after the quake subsided, residents were startled anew by loud emergency alerts on their mobile phones. At 11:46 a.m. came another alert, this one warning of potential aftershocks. Addressing the delay, a city emergency management official called an earthquake “a no notice event” and said authorities had to confirm the information they were receiving.

There were six minor aftershocks in the immediate area of the original temblor, the largest a magnitude 2.2 that was recorded at 1:32 p.m., according to USGS.

“New Yorkers are not accustomed to having earthquakes in our state,” New York Gov. Kathy Hochul told reporters. “Everyone should continue to take this seriously.”

NYC Department of Buildings Commissioner James Oddo asked for the “cooperation” of construction professionals for reports of damage to the city’s 1.1 million buildings.

In New Jersey’s Hunterdon County, where Lebanon Township is located, there were no reports of injuries or evacuations in the area around the epicenter, according to county officials.

The Board of County Commissioners said a damage assessment was underway and officials were beginning to receive reports of structural issues in buildings.

Three neighboring homes in Newark, New Jersey, were evacuated after residents reported structural damage, according to the city’s public safety director.

No injuries were reported but firefighters responded to calls about structural damage in the three buildings, more than 30 miles from where the quake originated, according to Newark Public Safety Director Fritz Fragé.

Ten families – 25 adults and three children – were relocated, he said.

All Newark city buildings were closed. Fragé said the city was inspecting buildings for damage and power outages.

In New Jersey’s Essex County, the quake is believed to have caused a water main break, according to the Office of Emergency Management of the Township of Montclair.

In Pennsylvania, the Philadelphia Police Department received more than 200 calls “in a very short period of 20 minutes” after the quake, Commissioner Kevin J. Bethel said. The calls overloaded the system.

“We were able to get our call base back down within 30 minutes,” Bethel said.

‘Good quality New York moment’

More than 23 million people felt “light shaking,” which is felt by most people and can cause cars to rock noticeably and cause a sensation like a truck striking a building, according to the USGS.

About 9,000 people felt “strong shaking,” which is described by the USGS as “felt by all” and can move heavy furniture and cause slight damage. This would occur closest to the epicenter near Lebanon, New Jersey. And nearly 300,000 people felt “moderate shaking,” which could be strong enough to break windows or cause dishes to fall.

Reed Whitmont, who lives in Park Slope, Brooklyn, was sitting in bed inside his old apartment building when everything started shaking. Then the cat bolted.

“It went on for about a minute, then I stuck my head out the window and all the neighbors were shouting and asking each other if they felt that too. Good quality New York moment.”

In Jersey City, New Jersey, Kristina Fiore was sitting at her desk in her apartment when her building shook for a few seconds.

In video from inside the home, objects rattled as a cat runs away. “It’s okay. It’s an earthquake!: Fiore is heard saying. At first Fiore thought there was an explosion at a nearby metal recycling plant, but the shaking got stronger. “I said out loud, ‘It’s an earthquake’ because I could tell that my 5-year-old was worried about what was happening. Also my cats were really freaking out. They were scared and confused for like an hour after the quake.”

At the Boonton Coffee Co. shop in Boonton, New Jersey, a video shared on social media showed customers running out of the store in confusion when the building started shaking. Some people are heard panicking. Others continued ordering with their barista.

The light shaking would be unlikely to cause damage, per initial data indications from the USGS. Initial reports indicated a 4.8 magnitude quake, but that was revised to 4.7 before being adjusted back to 4.8. This could change again as more data is reviewed.

The epicenter was just northeast of Lebanon, New Jersey, less than 50 miles west of New York City, according to the USGS.

The light quake was shallow, just below the surface at 5 km depth, which made it easier for residents in affected areas to feel the shaking. Initial reports indicate shaking was widely felt in New York City, Philadelphia and Washington, DC.

Some air and train travel affected

The USGS said a number of factors influenced the amount of places where the quake was felt, including the geology of the region itself.

The earthquake was on the extreme end of what the USGS considers a shallow earthquake: 0 to 70 km deep. The energy released by an earthquake is blunted by distance, so a shallower quake of the same magnitude as a deeper one will produce much more intense shaking at the surface.

The rocks that make up the Earth’s crust and mantle in the eastern US are much older, denser and harder – compressed by time – than they are in the West, according to the USGS. This makes them more efficient conduits of the seismic energy released by an earthquake, allowing it to travel in a more potent form over longer distances.

Buildings are also older in the Northeast and may not be designed to the latest earthquake code, the USGS said. This is particularly a concern for shorter buildings like houses. Earthquakes tend to shake in a faster back-and-forth motion in the East compared to the West, which puts smaller buildings more at risk for damage, the USGS noted.

The earthquake affected some air and train travel in the Northeast.

Flights to the New York Kennedy, Philadelphia, Baltimore, and Newark airports were initially held, according to the Federal Aviation Administration.

The air traffic control tower at Newark Liberty airport was being evacuated, a controller said in a radio transmission after the earthquake, meaning flights were being held while controllers moved to an alternate location.

”Nobody’s going to go anywhere for the time being,” a controller said over the radio frequency.

The runways were in the process of being inspected for damage.

At noon the FAA reported a ground stop remained in effect at Newark, and the controllers were relocating back to the tower.

Amtrak reported train service was slowed after the earthquake so track inspections could be performed.

“As of 3:30 PM ET, All inspections have been completed and service has been restored to normal speed. Residual delays should be expected,” Amtrak posted on X.

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Ray Sanchez, Alaa Elassar and CNN

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April 5, 2024
Powerful earthquake strikes Morocco, killing 300 and damaging historic Marrakech | CNN

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CNN
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A powerful 6.8-magnitude earthquake struck Morocco Friday night, killing nearly 300 people and damaging buildings in the historic city of Marrakech in what the United States Geological Survey (USGS) said was the strongest tremor to hit that part of the North African nation in more than a century.

The quake struck in Morocco’s High Atlas mountain range shortly after 11 p.m. local time at the relatively shallow depth of 18.5 kilometers (11.4 miles), USGS said, with the epicenter located about 72 kilometers (44.7 miles) southwest of Marrakech, a city of some 840,000 people and a popular tourist destination.

At least 296 people were killed, and 153 others were wounded, Morocco’s Interior Ministry said Saturday.

Many Moroccans spent the night on the streets in multiple cities fearful of aftershocks as a desperate mission to locate those trapped in the rubble got underway. Health authorities also called on people to donate blood to help victims.

Most deaths occurred in mountain areas that were hard to reach, authorities said, and rescue teams were having difficulties reaching the worst affected areas after roads were damaged, state-run TV Al Aoula reported.

The Royal Moroccan Armed Forces warned that residents to pay close attention to follow up tremors.

“We remind you of the need to exercise caution and take safety measures due to the risk of aftershocks,” the military wrote on X, formerly known as Twitter.

The USGS said Friday night’s quake was unusually strong for that part of Morocco.

“Earthquakes of this size in the region are uncommon, but not unexpected. Since 1900, there have been no earthquakes M6 (magnitude 6) and larger within 500 km of this earthquake, and only 9 M5 (magnitude 5) and larger earthquakes,” USGS said.

The US body predicted that “significant damage is likely and the disaster is potentially widespread”, noting that many people in the area reside in structures that are “highly vulnerable to earthquake shaking”.

Al-Aoula television on Saturday showed multiple buildings collapsed near the epicenter and reported that thousands of people had fled their homes after the country’s National Institute of Geophysics warned of aftershocks.

Most houses in the mountain village of Asni near the epicenter were damaged, Montasir Itri, a local resident, told Reuters.

“Our neighbours are under the rubble and people are working hard to rescue them using available means in the village,” he said.

Tremors were also felt further west near Taroudant, where a resident said he had fled his home and there had been aftershocks following the initial quake, according to Reuters.

“The earth shook for about 20 seconds. Doors opened and shut by themselves as I rushed downstairs from the second floor,” teacher Hamid Afkar told Reuters.

In the old city of Marrakech, a UNESCO World Heritage site, some houses have collapsed and people were moving debris by hand while they waited for heavy equipment, local resident Id Waaziz Hassan told Reuters news agency.

Another Marrakech resident, Brahim Himmi, told Reuters he saw ambulances coming out of the old town and that many building facades were damaged. He said people were frightened and were staying outside in case of another quake.

“The chandelier fell from the ceiling and I ran out. I’m still in the road with my children and we’re scared,” Houda Hafsi, a 43-year-old Marrakech resident, told Reuters.

A former imperial city with a history that dates back nearly 1,000 years, Marrakech is tightly packed with medieval-era palaces, mosques, gardens and bustling markets. Its old city center is surrounded by red earth walls and filled with buildings constructed in red sandstone, which gave the city its nickname the “red city.”

The walls were first laid out in the early 12th century and some of the ramparts were damaged in the quake, Al Aoula TV reported.

Before the Covid pandemic, Marrakech drew nearly three million tourists in 2019.

In addition to its rich culture and history, Marrakech is also Mocorro’s four largest city and a major economic center.

Shaking was also felt in the capital Rabat, some 350km north of of the High Atlas mountains, Reuters said citing eyewitnesses.

Reuters contributed to this report.

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September 8, 2023
Earthquakes Fast Facts | CNN

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CNN
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Here’s a look at earthquakes worldwide.

The US Geological Survey describes an earthquake as “the ground shaking caused by a sudden slip on a fault. Stresses in the earth’s outer layer push the sides of the fault together. Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the earth’s crust and cause the shaking that we feel during an earthquake.”

Earthquakes are measured using seismographs, which monitor the seismic waves that travel through the Earth after an earthquake strikes.

Scientists used the Richter Scale for many years to measure earthquakes but now largely follow the “moment magnitude scale,” which USGS says is a more accurate measure of size.

(selected timeline of earthquakes around the world with death tolls exceeding 100)

June 4, 2000 – A magnitude 7.9 earthquake strikes southern Sumatra, Indonesia, killing an estimated 103 people.

January 13, 2001 – A magnitude 7.7 earthquakes hits near San Miguel, El Salvador, killing an estimated 852 people.

January 26, 2001 – An estimated 20,000 people are killed by a magnitude 7.7 earthquake centered in Gujarat, India.

February 13, 2001 – Another earthquake strikes El Salvador, magnitude 6.6. Three hundred and fifteen people are estimated to have been killed.

June 23, 2001 – An estimated 138 people are killed in Peru by an 8.4-magnitude earthquake.

March 3, 2002 – In the Hindu Kush region of Afghanistan, an estimated 166 people are killed by a magnitude 7.4 earthquake.

March 25, 2002 – Another earthquake in the Hindu Kush region of Afghanistan, this one a magnitude 6.1, kills 1,000 people.

June 22, 2002 – A magnitude 6.5 earthquake strikes western Iran, killing an estimated 261 people.

February 24, 2003 – In southern Xianjiang, China, a magnitude 6.3 quake leaves an estimated 263 people dead.

May 1, 2003 – A 6.4-magnitude quake strikes eastern Turkey, killing approximately 177 people.

May 21, 2003 – An estimated 2,266 people are killed by a magnitude 6.8 quake in northern Algeria.

December 26, 2003 – A magnitude 6.6 earthquake strikes the city of Bam in southeast Iran. Around 31,000 people die in the quake.

February 24, 2004 – Approximately 631 people are killed in Morocco by a magnitude 6.4 quake.

December 26, 2004 – A magnitude 9.1 earthquake strikes off the west coast of Northern Sumatra, Indonesia. The earthquake and tsunamis generated by the earthquake kill 227,898 people in India, Sri Lanka, Indonesia, Thailand, Malaysia, Somalia, Kenya, Tanzania and Bangladesh. The quake releases an amount of energy equal to a 100-gigaton bomb and lasts between 500-600 seconds.

February 22, 2005 – A magnitude 6.4 earthquake strikes central Iran, killing at least 612 people.

March 28, 2005 – A magnitude 8.6 earthquake strikes off the coast of Indonesia, on the same fault line that originated a December 26 earthquake that launched a deadly tsunami. At least 1,300 people are killed.

October 8, 2005 – A magnitude 7.6 earthquake strikes Pakistan. At least 86,000 people are killed.

May 26, 2006 – A magnitude 6.3 earthquake occurs in central Java, Indonesia, killing at least 5,749 people.

July 17, 2006 – A magnitude 7.7 quake strikes Java, Indonesia, killing an estimated 730 people.

August 15, 2007 – A magnitude 8.0 earthquake hits Peru, about 100 miles south of the capital of Lima. Approximately 514 people are reported dead.

May 12, 2008 – A magnitude 7.9 earthquake strikes in central China, killing more than 87,000 people.

October 28, 2008 – A 6.4-magnitude earthquake strikes Pakistan, killing an estimated 166 people.

April 6, 2009 – A magnitude 6.3 earthquake strikes central Italy, killing 295 people.

September 29, 2009 – A magnitude 8.0 earthquake in the Samoa Islands kills 192 people.

September 30, 2009 – A magnitude 7.6 earthquake strikes Sumatra, Indonesia, killing more than 1,000 people.

January 12, 2010 – A 7.0-magnitude earthquake strikes 14 miles west of Port-au-Prince, Haiti. USAID estimates the death toll to be about 230,000, but other estimates are as high as 316,000.

February 27, 2010 – An 8.8-magnitude earthquake strikes central Chile, killing an estimated 547 people.

April 13, 2010 – A 6.9-magnitude earthquake strikes China’s Qinghai province. Approximately 2,968 people are reported dead.

October 25, 2010 – At least 503 people die due to a magnitude 7.7 earthquake off Indonesia and a subsequent tsunami.

February 21, 2011 – A 6.3-magnitude earthquake strikes Christchurch, New Zealand. An estimated 181 people are killed.

March 11, 2011 – A 9.1-magnitude earthquake strikes near the east coast of Honshu, Japan, causing a massive tsunami. The quake’s epicenter is 231 miles away from Tokyo. The total of confirmed deaths and missing is over 22,000.

September 18, 2011 – A magnitude 6.9 earthquake strikes Sikkim, India, killing an estimated 111 people.

October 23, 2011 – A 7.1-magnitude earthquake strikes eastern Turkey. The death toll is 604 people.

February 6, 2012 – A 6.7-magnitude earthquake strikes off the coast of Negros, Philippines, killing at least 113 people.

August 11, 2012 – Two earthquakes hit northern Iran. The first to strike is a 6.4-magnitude earthquake. 11 minutes later, a second earthquake with a magnitude of 6.3 hits. At least 306 people are killed.

November 7, 2012 – A 7.4 earthquake off the coast of Guatemala kills an estimated 139 people.

April 20, 2013 – An earthquake strikes the southwestern Chinese province of Sichuan, killing at least 192 people. The USGS gauges it at 6.6-magnitude and the China Earthquake Networks Center estimates it at 7.0-magnitude.

September 24, 2013 – A magnitude 7.7 earthquake hits the Balochistan province of Pakistan. More than 300 people are reported killed.

August 3, 2014 – An earthquake hits China’s Yunnan province, killing at least 615 people and injuring more than 2,400. The USGS gauges the quake at 6.1 magnitude and the China Earthquake Networks Center estimates it at 6.5 magnitude.

April 25, 2015 – A 7.8-magnitude earthquake strikes Nepal, and is centered less than 50 miles from its capital Kathmandu. The death toll is more than 8,000, with 366 missing, according to Nepal’s National Emergency Operations Center. Weeks later on May 12, a 7.3-magnitude earthquake strikes the already reeling country of Nepal, killing at least 125 in Nepal, India and Tibet.

October 26, 2015 – A 7.5-magnitude earthquake hits South Asia, killing at least 364 people and injuring more than 2,000 others. The epicenter is in northeastern Afghanistan, but most of the deaths – at least 248 – are reported in Pakistan.

April 16, 2016 – A 7.8-magnitude earthquake strikes coastal Ecuador, killing 663 people.

August 24, 2016 – A 6.2-magnitude earthquake strikes central Italy, killing at least 290 people.

September 19, 2017 – A 7.1-magnitude earthquake hits Mexico City and surrounding states, killing at least 369 people.

November 12, 2017 – A 7.3-magnitude earthquake hits the border region between Iraq and Iran. More than 600 people are killed.

September 28, 2018 – A 7.5-magnitude earthquake strikes the Indonesian island of Sulawesi. More than 2,100 people are killed and 1,300 missing from the earthquake and resulting tsunami.

August 14, 2021 – A 7.2-magnitude earthquake strikes southwest Haiti. Two days later, Tropical Storm Grace brings strong winds and heavy rain to the same region, complicating relief efforts. Approximately 2,248 people are killed and 12,763 injured.

June 22, 2022 – A 5.9-magnitude earthquake strikes eastern Afghanistan. More than 1,000 people are killed and at least 1,500 are injured.

November 21, 2022 – A 5.6-magnitude earthquake hits the Cianjur region in West Java, Indonesia, killing more than 334 people.

February 6, 2023 – A 7.8-magnitude earthquake strikes Turkey and Syria. The epicenter is 23 kilometers (14.2 miles) east of Nurdagi, in Turkey’s Gaziantep province. More than 50,000 people are killed and tens of thousands injured.

(from the USGS)

May 22, 1960 – Chile, 9.5

March 28, 1964 – Prince William Sound, Alaska, 9.2

December 26, 2004 – Sumatra, Indonesia, 9.1

March 11, 2011 – Honshu, Japan, 9.1

November 4, 1952 – Kamchatka, Soviet Union, 9.0

February 27, 2010 – Chile, 8.8

January 31, 1906 – Ecuador, 8.8

February 4, 1965 – Rat Islands, Alaska, 8.7

August 15, 1950 – Assam, Tibet, 8.6

April 11, 2012 – Northern Sumatra, Indonesia, 8.6

March 28, 2005 – Northern Sumatra, Indonesia, 8.6

March 9, 1957 – Andreanof Islands, Alaska, 8.6

April 1, 1946 – Unimak Island, Alaska, 8.6

February 1, 1938 – Banda Sea, Indonesia, 8.5

November 11, 1922 – Chile-Argentina Border, 8.5

October 13, 1963 – Kuril Islands, 8.5

February 3, 1923 – Kamchatka, Soviet Union, 8.4

September 12, 2007 – Southern Sumatra, Indonesia, 8.4

June 23, 2001 – Arequipa, Peru, 8.4

March 2, 1933 – Sanriku, Japan, 8.4

January 12, 2010 – Haiti – 316,000 killed (magnitude 7.0). Other sources report 230,000.

July 27, 1976 – Tangshan, China – 255,000 killed (7.5)

December 26, 2004 – Sumatra, Indonesia – 227,898 killed in quake and resulting tsunami (9.1)

December 16, 1920 – Haiyuan, China – 200,000 killed (7.8)

September 1, 1923 – Kanto, Japan – 143,000 killed (7.9)

October 5, 1948 – Ashgabat, Turkmenistan – 110,000 killed (7.3)

May 12, 2008 – Eastern Sichuan, China – 87,587 killed (7.9)

October 8, 2005 – Pakistan – 86,000 (7.6)

December 28, 1908 – Messina, Italy – 70,000 (7.2)

May 31, 1970 – Chimbote, Peru – 66,000 killed (7.9)

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February 24, 2023
A 5.1 magnitude earthquake strikes near San Jose, US Geological Survey reports | CNN

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CNN
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The US Geological Survey (USGS) is reporting a 5.1 magnitude earthquake in Seven Trees, near San Jose, California.

Preliminary information from the USGS says the quake was 6.9 kilometers (4.2 miles) deep and hit around 11:42 a.m. PT Tuesday.

“Additional shaking from aftershocks can be expected in the region. We are continuing to monitor this region,” the California Geological Survey tweeted.

Earthquakes are measured using seismographs, which monitor the seismic waves that travel through the Earth after an earthquake strikes. Quakes between 2.5 and 5.4 in magnitude are often felt, but only cause minor damage, according to Michigan Tech’s UPSeis website.

This is a developing story.

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October 25, 2022