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Sat, 10 Apr 2021
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Earthquakes

Seismograph

Shallow 3.5 earthquake hits northwest France

quake
An earthquake of magnitude 3.5 occurred in the morning on Saturday 20 March 2021 at 10:22 am local time near Rennes, Ille-et-Vilaine, Bretagne, France, as reported by France's Réseau National de Surveillance Sismique (RéNaSS).

According to preliminary data, the quake was located at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.

Seismograph

6.1-magnitude quake hits west of Macquarie Island

Earthquake
© Associated Press
An earthquake with a magnitude of 6.1 jolted west of Macquarie Island at 05:19:31 GMT on Saturday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 59.6207 degrees south latitude and 150.3136 degrees east longitude.

Seismograph

Magnitude 7.2 earthquake rocks northeastern Japan

quake
A strong magnitude 7.2 earthquake struck off the coast of northeastern Japan at a depth of 60 km on Saturday evening at 6:09 p.m.

In Miyagi Prefecture, where at least one person was injured, the quake measured up to a strong 5 on the Japanese seismic intensity scale to 7.

Tsunami waves of up to 1 meter may have reached the Miyagi Prefecture coast shortly after 6:30 p.m., according to NHK. All tsunami warnings were lifted by 7:30 p.m.

Due to the tsunami advisory, the town of Watari in the prefecture issued an evacuation order covering 2,527 homes and 6,911 residents.

Two hundred homes in Kurihara, Miyagi Prefecture were without power, NHK said. The quake caused the Tohoku Shinkansen to suspend services. Services were expected to resume around 10 p.m.


Seismograph

Shallow M6.0 earthquake strikes off Algeria

Algeria quake map
© Volcano Discovery

A shallow 6.0 magnitude earthquake struck off the Algerian coast on Thursday, the US Geological Survey said.

The USGS said the quake hit 20 kilometres north-east of the city of Bejaia at 1.04am local time (4.04am UAE), at a depth of 10 kilometres.


Seismograph

M6.6 earthquake strikes SSE of Ust'-Kamchatsk Staryy, Russia

Russia quake map
© Volcano Discovery
Date & time: 16 Mar 2021 18:38:22 UTC - 15 hours ago
Local time at epicenter: Wednesday, 17 Mar 2021 5:38 am (GMT +11)
Magnitude: 6.6
Depth: 22.1 km
Epicenter latitude / longitude: 54.7018°N / 163.2077°E (North Pacific Ocean, Russia)
Nearest volcano: Vysoky (158 km / 98 mi)

Seismograph

Strong M5.4 earthquake hits Reykjanes peninsula, Iceland

Iceland earthquake map
© Volcano Discovery
An earthquake of magnitude 5.4 hit the Reykjanes peninsula, Southwest Iceland, at 2:15 pm yesterday, mbl.is reports. Its source was 5.4 km southwest of Fagradalsfjall mountain. Residents as far away as Sauðárkrókur, North Iceland, reported having felt it, as well as ones in Vestmannaeyjar islands and Kirkjubæjarklaustur, South Iceland.

It was followed 20 seconds later by another quake of magnitude 4.0, prolonging the vibration of people's houses and increasing the sensation of being rocked by a boat. Earlier in the day, at 12:34 pm, an earthquake of magnitude 4.6 had already hit the area.

The M5.4 quake was the second largest since the swarm of earthquakes began with one of magnitude 5.7 on February 24.

Scientist are closely monitoring the area for the possibility of a volcanic eruption.

A recording from the security camera of the rescue team Þorbjörn's building in the town of Grindavík, on the Reykjanes peninsula, clearly shows how the quake shook vehicles, stored inside the building, located less than 5 km from the source. The video was posted by the rescue team on Facebook.


Comment: See also:


Attention

Taal volcano, Philippines generates 252 volcanic earthquakes in 24 hours

Taal Volcano, Philippines
© SHUTTERSTOCK VIA CNN PH
Taal Volcano stays on alert level two on Monday after the Philippine Institute of Volcanology and Seismology recorded 252 volcanic earthquakes in the last 24 hours.
The Philippine Institute of Volcanology and Seismology (Phivolcs) on Monday maintained alert level 2 over Taal Volcano after it generated 252 volcanic earthquakes in the last 24 hours.

Under alert level 2, the volcano is seen to be under "increased unrest" as activities within the crater "indicate increased magmatic activity at shallow depths beneath the edifice," Phivolcs said in its 8 a.m. advisory.

"Sudden steam-driven or phreatic explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within the Taal Volcano Island," it said.

Last month, Phivolcs warned of Taal's possible eruption over a year since it last spewed ash and hot rocks, covering parts of Batangas, Cavite, and Laguna with mud and grime.

Seismograph

Shallow mag. 6.0 earthquake in the South Sandwich Islands region

Earthquake
© Associated Press
Date & time: 14 Mar 2021 12:05:16 UTC -

Local time at epicenter: Sunday, 14 Mar 2021 10:05 am (GMT -2)

Magnitude: 6

Depth: 10.0 km

Epicenter latitude / longitude: 59.7°S / 29.7°W (South Atlantic Ocean, South Georgia & South Sandwich Islands)

Nearest volcano: Thule Islands (134 km / 83 mi)

Attention

34,000 quakes in two weeks near Fagradalsfjall volcano, Iceland - 900% increase in activity compared with whole of 2020

Reykjanes
© IMO
Earthquakes on the Reykjanes peninsula during the past 2 weeks
The Icelandic Met Office (IMO) announced earlier today, that the total number of earthquakes in the region has exceeded 34,000 since the onset of the seismic swarm about 2 weeks ago.

For comparison, it had about 3,400 quakes in the whole of 2020, which also had shown elevated activity, while the average during the previous years was in the range of 1,000-3,000 quakes per year.

Comment: It certainly seems that seismic and volcanic activity have increased recently: Also check out SOTT radio's:


Attention

Swarm of 20,000 earthquakes could trigger Iceland's volcanoes to erupt

Aerial view of the Reykjanes peninsula, Iceland
© AFP via Getty Images
Aerial view of the Reykjanes peninsula, Iceland, some 50 kilometres west of the capital Reykjavik – one of the three most seismically active areas on the planet.
Fiery eruptions spewing from Iceland's volcanoes could follow the tens of thousands of earthquakes that have shaken the nation over the past fortnight, scientists fear.

Experts monitoring underground magma movements in the Reykjanes Peninsula, in southwest Iceland, are on tenterhooks. Seismic whispers and changes in the land's shape mean an "effusive volcanic eruption could occur", according to the Icelandic Meteorological Office (IMO). But so far, nothing has happened.

"That's something new. We didn't expect that," Dr Dave McGarvie, a volcanologist at Lancaster University said. The researcher told National Geographic that "people started wondering, what the hell is going on here?" when magma moving towards the earth's surface began to die down - after an eruption appeared to be just hours away.

Murmurs in the region, first detected over a year ago, have culminated in more than 20,000 earthquakes since activity began on 24 February, according to the IMO.

Comment: Scientists in Iceland say 'strong signs' volcanic eruption is imminent