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Sun, 25 Oct 2020
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Earthquakes

Seismograph

Shallow 4.5 magnitude earthquake hits off Northwest French coast

earthquake graph
Earthquakes of 4 - 5 magnitude, which are considered moderate, rarely occur in France. In November 2019, two earthquakes measuring 5.1 and 5.7 were detected in southern France.

A 4.5-magnitude earthquake struck on 27 June off the coast of France, data from the French seismological service showed.

The agency said that it registered the quake 105 kilometres (65 miles) southeast of the town of Douarnenez at 10:59 GMT. The epicentre was located at a depth of two kilometres (1.2 miles).

There are no reports about casualties or damages caused by the quake. No tsunami warning has been issued.

Comment: A 4.8 magnitude earthquake struck southeast France on November 11 last year, causing an unusual crack in the Earth's crust, puzzling scientists.


Seismograph

Shallow 6.4-magnitude earthquake hits Xinjiang, China

quake
A 6.4-magnitude earthquake jolted Yutian county of Hotan prefecture in Northwest China's Xinjiang Uygur autonomous region at 5:05 am Friday Beijing Time, according to the China Earthquake Networks Center.

The epicenter was monitored at 35.73 degrees north latitude and 82.33 degrees east longitude, with a depth of 10 km, the CENC said.

No obvious tremors were felt in Yutian county seat.

The average altitude within 5 km around the epicenter is about 5,300 m, and there are no villages within 20 km around the epicenter, according to the regional seismological bureau.

Source: Xinhua

Seismograph

M5.4 earthquake on Turkey-Iran border causes damage to houses

turkey quake
A magnitude-5.4 earthquake hit Turkey's eastern province of Van, the country's disaster agency said.

The National Disaster Management Agency (AFAD) said the quake occurred at 1.03 p.m. local time in the Özalp district at 6.9 kilometers beneath the ground.

There were no immediate reports of casualties.

Some houses were damaged due to the tremors, and damage assessment studies are ongoing, said Van Governor Mehmet Emin Bilmez.

Comment: See also: Strong M7.5 earthquake hits Oaxaca, Mexico - shaking felt 400 miles away - at least 5 dead (UPDATE)


Seismograph

Magnitude 6.1 earthquake off eastern coast of Japan rattles Tokyo

Japan earthquake map
© JAPAN METEOROLOGICAL AGENCY
The epicenter of the earthquake that occurred on June 25 at 4:47 a.m. is located in Chiba Prefecture
A magnitude 6.1 earthquake struck off eastern Japan early Thursday, the Japan Meteorological Agency said, rocking buildings in the capital Tokyo and surrounding prefectures. No tsunami warning was issued.

The 4:47 a.m. quake, which originated at a depth of about 36 kilometers, registered as lower 5 on nation's shindo seismic intensity scale of 7 in the city of Asahi, Chiba Prefecture. The agency warned that quakes of similar intensity may follow over the next week in areas that experienced strong swaying.

An intensity of lower 5 means people are likely to become frightened and feel the need to hold onto something stable, according to the agency.

Seismograph

5.8 magnitude earthquake shakes California

A 5.8 magnitude earthquake was measured 17km from Lone Pine, Calif.
© USGS
A 5.8 magnitude earthquake was measured 17km from Lone Pine, Calif.
A 5.8 magnitude earthquake hit California around 10:45 a.m. local time Wednesday.

The epicenter was near Cartoga, about 180 miles north of Los Angeles.

People at several businesses near Lone Pine and Bishop told ABC News the while the shaking was "intense," they didn't see any damage.

Some shaking was felt in LA.

This comes a day after a 7.4 magnitude quake hit Mexico, near the resort of Huatulco, killing at least six people and damaging hundreds of homes, according to The Associated Press. At least six others were hurt, including two people in Mexico City, more than 300 miles from the epicenter.

Attention

Strong M7.5 earthquake hits Oaxaca, Mexico - shaking felt 400 miles away - at least 5 dead (UPDATE)

quaker mexico 7
© Andres Stapff/Reuters
People stand on the street in Mexico City after the earthquake.
A 7.5-magnitude earthquake has rattled large swaths of southern and central Mexico, according to the country's national seismological service.

The quake struck the southern state of Oaxaca at 10.29am local time ( 1429 BST) on Tuesday but was felt more than 400 miles away in the capital, Mexico City, where buildings shook and panicked residents fled on to the streets.

Mexican newspapers said there were no immediate reports of damage in the capital. Claudia Sheinbaum, the city's mayor, tweeted: "So far no major incidents [reported]."

The situation near the quake's epicentre in Crucecita, Oaxaca, was not immediately clear.

Comment: The US Tsunami Warning Center has issued a warning for the potential threat of tsunami waves for the Pacific coasts of Mexico, Guatemala, Honduras and El Salvador.

Footage and more details from Twitter:














UPDATE:The Guardian on June 24 reports:
A 7.5-magnitude earthquake has rattled large swaths of southern and central Mexico, killing at least five people.

President Andrés Manuel López Obrador said one person was killed in a building collapse in Huatulco, Oaxaca, while state governor Alejandro Murat said a second person was killed in an apparent house collapse in the mountain village of San Juan Ozolotepec and a third died in circumstances he did not explain.

Federal civil defence authorities reported two more deaths: a worker at the state-run oil company, Pemex, fell to his death from a refinery structure, and a man died in the Oaxaca village of San Agustin Amatengo when a wall fell on him.


Pemex also said the quake caused a fire at its refinery in the Pacific coast city of Salina Cruz, relatively near the epicenter. It said one worker was injured but the flames were quickly extinguished. Churches, bridges and highways also suffered damage during the quake.

López Obrador said there had been more than 140 aftershocks, most of them small.

Mexico's national seismological service said the quake struck the southern state of Oaxaca at 10.29am local time (1429 BST) on Tuesday but was felt more than 400 miles away in the capital, Mexico City, where buildings shook and panicked residents fled on to the streets.

"It really moved," said Francisco Aceves, the owner of an import-export firm in Mexico City who was on the 22nd floor of an office block when the quake struck.

Mexican newspapers said there were no immediate reports of damage in the capital, where memories of a 2017 earthquake that felled buildings and killed more than 300 people are still fresh.

"So far no major damage has been reported - just the collapse of a few walls and building fronts," Claudia Sheinbaum, the city's mayor, said in a video from Mexico City's emergency response centre.

Richard Hanson, a 44-year-old American who runs an NGO in Oaxaca's state capital called Tejiendo Alianzas, said: "It started really slow ... and then very quickly it notched up very fast."

"Our fan was moving around a lot, you could hear the noise of the walls and the earth moving, things stared falling off the shelves in the kitchen and crashing and breaking on the ground."

Outside Hanson said "people were running out of buildings, screaming and getting on the ground ... Some people were just running to any open space."

Photographs from the state capital showed rubble strewn streets and the partially collapsed facade of one historic building.

The earthquake's epicentre was just east of Huatulco, one of Mexico's top tourist destinations, where beaches had only just reopened last week after closing because of the Covid-19 pandemic.

Reuters said Tuesday's quake set off a tsunami warning for a radius of 1,000km (621 miles) on the Pacific coasts of Mexico and Central America, including Mexico, Guatemala, El Salvador and Honduras.

Murat told Milenio Televisión the quake had triggered landslides, cut off road links between some towns and damaged some buildings, including one hospital that had been treating Covid-19 patients. Murat said the sick were being moved elsewhere. But no major buildings in the state capital appeared to have been severely damaged.



Seismograph

Strong, shallow M6.0 earthquake hits Iceland, ongoing intense earthquake swarm

epicenter earthquake iceland june 2020
© CSEM
A strong and shallow earthquake registered by the USGS as M6.0 hit near the coast of northern Iceland at 19:07 UTC on June 21, 2020. The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting M5.7 at a depth of 12 km (7.4 miles). The quake is a part of an ongoing intense earthquake swarm, with more than 2 000 earthquakes since June 19.

The epicenter was located 50.8 km (31.6 miles) NNE of Siglufjörður (population 1 190) and 101.4 km (63 miles) N of Akureyri (population 17693).

There are about 13 000 people living within 100 km (62 miles).

35 000 people are estimated to have felt light shaking.

Seismograph

Earthquakes shake North Iceland

Iceland earthquakes
© Screenshot, Icelandic Met Office
An earthquake measuring 5.6 was felt in towns and villages in North Iceland on Saturday afternoon, RÚV reports.

The quake occurred just after 3pm, and was centered offshore, roughly 20 km northeast of Siglufjörður. According to the Icelandic Met Office, it came on the heels of a similarly sized quake, measuring 5.3, in the same area, and was felt by residents in Dalvík, Hofsós, Siglufjörður, and Akureyri, and as well as those in the municipality of Hörgársveit, further inland.

The Tjörnes fracture zone started experiencing an earthquake swarm on Friday afternoon, peaking with the 5.6 quake on Saturday. Following this, there were a number of smaller quakes, many of which were measured at a 3.0 or higher.

Though the largest earthquake was felt all around the region, it doesn't seem to have caused any substantial damage and police in the area said they received fewer calls about it than expected, most likely because sunny weather had taken most people outdoors on Saturday afternoon.

Comment: Iceland's Grímsvötn volcano showing signs of increased activity, eruption possible


Seismograph

Shallow 7.3 magnitude earthquake hits south of Kermadec Islands

Earthquake seismograph


Summary


Magnitude M 7.3
Region SOUTH OF KERMADEC ISLANDS
Date time 2020-06-18 12:49:54.5
UTC Location 33.43 S ; 177.71 W
Depth 10 km

Distances 1096 km NE of Wellington, New Zealand / pop: 382,000 / local time: 00:49:54.5 2020-06-19
695 km NE of Whakatane, New Zealand / pop: 18,700 / local time: 00:49:54.5 2020-06-19

Attention

Increased seismic activity near Kick 'em Jenny underwater volcano

Kick'em Jenny volcano
© NADMA
Grenada's National Disaster Management Agency (NaDMA) has noted an increase in seismic activity near the Kick 'em Jenny underwater volcano.

In an update shared June 14, 2020 via social media, NaDMA said it received technical advice from the monitoring team at the University of the West Indies Seismic Research Centre St Augustine Campus Trinidad and Tobago (UWI SRC), showing increased seismic activity at the Kick 'em' Jenny Volcano.

The latest activity was observed over a seven-day period in the month of June.

"Though the Alert level remains at YELLOW, which is a 1.5 km exclusion zone around the summit of the volcano. However, with the increased activity, the Agency encourages marine operators to be vigilant when traversing the area, as increased seismic activity also results in the emission of gases, which can reduce the density of the water around the summit."