Geology, Earthquakes & Volcanism News and Discussions

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Death toll of powerful earthquake in Haiti soars to 1,297
Source: AP

By EVENS SANON and MARK STEVENSON

LES CAYES, Haiti (AP) — The death toll from a 7.2-magnitude earthquake in Haiti climbed to 1,297 on Sunday, a day after the powerful temblor turned thousands of structures into rubble and set off franctic rescue efforts ahead of a potential deluge from an approaching storm.

Saturday’s earthquake also left at least 5,700 people injured in the Caribbean nation, with thousands more displaced from their destroyed or damaged homes. Survivors in some areas were forced to wait out in the open amid oppressive heat for help from overloaded hospitals.

The devastation could soon worsen with the coming of Tropical Depression Grace, which is predicted to reach Haiti on Monday night. The U.S. National Hurricane Center warned that although Grace had weakened from tropical storm strength Sunday, it still posed a threat to bring heavy rain, flooding and landslides.

The earthquake struck the southwestern part of the hemisphere’s poorest nation, almost razing some towns and triggering landslides that hampered rescue efforts in a country already struggling with the coronavirus pandemic, a presidential assassination and a wave of gang violence.

Read more: https://apnews.com/article/haiti-earthq ... 238d13558c
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Post by Time_Traveller »

Mount Etna is 100 feet taller than it was 6 months ago
4 days ago

Mount Etna, Europe's tallest and most active volcano, has erupted so much in the past six months, it has grown about 100 feet (30 meters) in height, satellite images reveal.

The youngest and most active of Etna's four summit craters — the southeastern crater — is now the tallest part of the volcano, towering 11,013 feet (3,357 m) above sea level, the tallest it has been in recorded history, according to the National Institute for Geophysics and Volcanology (INGV), located at the foot of Mount Etna in Catania, Sicily.

This sudden growth spurt is the result of about 50 eruptions at the southeastern crater since Feb. 16, 2021, which have led to a "conspicuous transformation of the shape of the volcano," the INGV reported in a translated statement released Aug. 10. Scientists discovered the explosive growth while analyzing images taken by the Earth-imaging Pléiades satellites on July 13 and July 25. The data have an uncertainty of about 10 feet (3 m), the INGV noted.

In fact, the southeastern crater is now taller than its "big brother," the northeastern crater, the tallest peak on Etna for the past 40 years.

After the northeastern crater erupted in 1980 and 1981, it reached a maximum height of 10,990 feet (3,350 m). But that height decreased over the years as the crater's edges collapsed. As of the summer of 2018, the northeastern crater measured 10,912 feet (3,326 m) tall.
https://www.livescience.com/mount-etna- ... X8tk68EMDA
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wjfox wrote: Thu Sep 02, 2021 2:31 pm
I was about to post this but you beat me to it. This is a good addition to the timeline. :)
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4.3 magnitude earthquake hits Carson area, shakes SoCal
Source: abc7 Los Angeles
CARSON, Calif. (KABC) -- A 4.3 magnitude earthquake struck in the Carson area Friday night, with shaking felt throughout the Los Angeles region.

Reports of shaking were felt in the San Fernando Valley, Antelope Valley, Ventura County, Orange County and possibly as far south as San Diego, according to the USGS.

The quake hit near the Carson area at 7:58 p.m. at a depth of about 9 miles. It was originally estimated at 4.4 and then downgraded to 4.3

DEVELOPING: This story will be updated.
Read more: https://abc7.com/earthquake-los-angeles ... /11028566/
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Volcano Erupts on La Palma Island
Source: The Jerusalem Post

A volcano erupted on the Spanish Canary Island of La Palma on Sunday, sending fountains of lava and a plume of smoke and ash into the air from the Cumbre Vieja national park in the south of the island.

Authorities had already begun evacuating the infirm and some farm animals from the surrounding villages before the eruption, which took place on a wooded slope in the Cabeza de Vaca area at 3:15 p.m. (1415 GMT), according to the islands' government.
Immediately after the eruption, the municipality urged residents in a statement to "exercise extreme caution," and stay away from the area and off the roads.

The population of nearby villages was told to go to one of five centers to be evacuated, and soldiers were deployed to help.
Read more: https://www.jpost.com/breaking-news/vol ... and-679812
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Hawaii's Kilauea volcano erupts, lava fountains form in park
Source: AP
HONOLULU (AP) — One of the most active volcanos on Earth is erupting on Hawaii’s Big Island.

Officials with the U.S. Geological Survey confirmed Wednesday that an eruption has begun in Kilauea volcano’s Halemaumau crater at the volcano’s summit.

Webcam footage of the crater showed lava fountains covering the floor of the crater and billowing clouds of volcanic gas were rising into the air. The same area has been home to a large lava lake at various times throughout the volcano’s eruptive past.

The eruption is not in an area with homes and is entirely contained within Hawaii Volcanoes National Park.
Read more: https://apnews.com/article/environment- ... ccfd18b6f1
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Largest Underwater Eruption Ever Recorded Gave Birth to Massive New Volcano
by Michelle Starr
September 30, 2021

https://www.sciencealert.com/the-larges ... ew-volcano

Introduction:
(Science Alert) A huge seismic event that started in May of 2018 and was felt across the entire globe has officially given birth to a new underwater volcano.

Off the eastern coast of the island of Mayotte, a gigantic new feature rises 820 meters (2,690 feet) from the seafloor, a prominence that hadn't been there prior to an earthquake that rocked the island in May 2018.

"This is the largest active submarine eruption ever documented," the researchers wrote in their paper.

The new feature, thought to be part of a tectonic structure between the East African and Madagascar rifts, is helping scientists understand deep Earth processes about which we know relatively little.
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October 7 Quake That Hit Tokyo Not Near the Level of a Predicted ‘Big One’
by Takuro Yamano and Takahiro Takenouchi.
October 8, 2021

https://www.asahi.com/ajw/articles/14456372

Introduction:
(The Asahi Shimbun) A strong earthquake with a preliminary magnitude of 6.1 jolted Tokyo and surrounding areas late on Thursday, stopping train lines and causing sporadic power cuts, but there were no reports of major damage, Japan’s public broadcaster NHK said.

The tremor, at 10:41 p.m., registered upper 5 on Japan’s intensity scale of 7, a level that could cause some damage to buildings and power cuts, the Japan Meteorological Agency said.

The quake had an epicenter in Chiba Prefecture, to the east of the capital Tokyo. There was no danger of a tsunami from the quake, according to NHK.

The government set up an emergency response task force.

NHK showed new Prime Minister Fumio Kishida rushing back to his office. He told reporters he had instructed the task force to “find out about the latest situation, coordinate with local authorities on rescuing the victims of the disaster,” and to provide information to the public in a speedy manner.
https://www.asahi.com/ajw/articles/14456886:
(The Asahi Shimbun) The Oct. 7 earthquake was the strongest felt in Tokyo in a decade, but it will pale in comparison to the one that has long been predicted to devastate the capital.

Seismologists and other experts are now trying to determine if the latest quake is tectonically connected to the future “Big One.”

“The earthquake anticipated by the government’s Cabinet Office would have a rather shallow focus, but the latest one’s focus was deeper and smaller in magnitude,” the Meteorological Agency said at a news conference early on Oct. 8.

The Oct. 7 quake had a magnitude of 5.9. The future one is expected to be of magnitude 7 or larger.

Each whole number on the magnitude scale represents a tenfold increase in the measured amplitude and a 32-fold rise in energy release.
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