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Wed, 19 Jan 2022
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Earthquakes

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New type of earthquake discovered

Rebecca Harrington
© RUB, Kramer
Rebecca Harrington is an expert in analysing induced earthquakes.
The recently discovered seismic events are slower than conventional earthquakes. Their existence supports a scientific theory that until now had not been sufficiently substantiated by measurements.

A Canadian-German research team have documented a new type of earthquake in an injection environment in British Columbia, Canada. Unlike conventional earthquakes of the same magnitude, they are slower and last longer. The events are a new type of induced earthquake that have been triggered by hydraulic fracturing, a method used in western Canada for oil and gas extraction. With a network of eight seismic stations surrounding an injection well at distances of a few kilometres, researchers from the Geological Survey of Canada, Ruhr-Universität Bochum, and McGill University recorded seismic data of approximately 350 earthquakes. Around ten percent of the located earthquakes turned out to exhibit unique features suggesting that they rupture more slowly, similar to what has previously been observed mainly in volcanic areas.

The group headed by Hongyu Yu - first at RUB, later at the Canadian Geological Survey of Canada - and RUB Professor Rebecca Harrington describes the results in the journal Nature Communications, published online on 25 November 2021.

Seismograph

Strong earthquake of magnitude 6 hits Indonesia

grpaph
A strong and shallow earthquake of magnitude 6.0 on the Richter Scale jolted Indonesia on Sunday.

The quake was reported at 5:17 am with its epicentre at 259 km north of Tobelo in Indonesia, according to the US Geological Survey (USGS).

The depth of the quake was 174.3 km.

Seismograph

Shallow magnitude 6.0 earthquake off South Sandwich Islands

grpaph
6.0 magnitude earthquake

UTC time: Friday, December 03, 2021 08:33 AM
Your time: Friday, December 3, 2021, 8:33 AM GMT
Magnitude Type: mww
USGS page: M 6.0 - South Sandwich Islands region
USGS status: Reviewed by a seismologist
Reports from the public: 0 people
9 km depth

Seismograph

Shallow magnitude 6.2 earthquake - South Pacific Ocean off Easter Island, Chile

maps
Very strong magnitude 6.2 earthquake at 10 km depth

Date & time: Dec 3, 2021 04:40:04 UTC
Local time at epicenter: Thursday, Dec 2, 2021 9:40 pm (GMT -7)
Magnitude: 6.2
Depth: 10.0 km
Epicenter latitude / longitude: 28.6292°S / 112.2613°W↗ (South Pacific Ocean, Chile)

Seismograph

Shallow 6.0-magnitude earthquake hits off Papua New Guinea

MAPPED
An earthquake with a magnitude of 6.0 jolted 112 km off Kavieng, Papua New Guinea, at 10:36:18 GMT on Tuesday, the U.S. Geological Survey said.

The epicenter, with a depth of 10.0 km, was initially determined to be at 3.5185 degrees south latitude and 151.1613 degrees east longitude.

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Shallow magnitude 6.3 earthquake off Japan

quake
Major magnitude 6.3 earthquake - North Pacific Ocean, Japan​

Date & time: Nov 29, 2021 12:40:43 UTC
Local time at epicenter: Monday, Nov 29, 2021 9:40 pm (GMT +9)
Magnitude: 6.3
Depth: 6.1 km
Epicenter latitude / longitude: 31.1809°N / 142.4851°E↗ JP.png (North Pacific Ocean, Japan)

Seismograph

Powerful 7.5 magnitude earthquake hits Peru

Video footage shows debris on a street after an earthquake, in Bagua, Peru
© AP
Video footage shows debris on a street after an earthquake, in Bagua, Peru

The U.S. Geological Survey says a strong earthquake with a preliminary magnitude of 7.5 has struck in northern Peru.

The earthquake took place at 5:52 a.m. Sunday local time (10:52 GMT).

While it was extremely strong, it was relatively deep, — measured at 112 kilometers — which usually reduces damage and casualties.

The epicentre was 42 kilometers (26 miles) north northwest of the coastal city of Barranca.


Seismograph

6.2 magnitude earthquake strikes Myanmar (Burma)

mapped
6.2 magnitude earthquake 20 km from Hakha, Chin, Myanmar

UTC time: Thursday, November 25, 2021 23:45 PM
Your time: Thursday, November 25, 2021, 11:45 PM GMT
Magnitude Type: mww
USGS page: M 6.2 - 19 km SW of Falam, Myanmar
USGS status: Reviewed by a seismologist
Reports from the public: 268 people


Seismograph

6.0-magnitude earthquake hits 75 km E of Lata, Solomon Islands - USGS

grpaph
An earthquake with a magnitude of 6.0 jolted 75 km E of Lata, Solomon Islands at 12:04:10 GMT on Thursday, the U.S. Geological Survey said.

The epicenter, with a depth of 39.91 km, was initially determined to be at 10.7464 degrees south latitude and 166.4849 degrees east longitude.

Seismograph

Strong magnitude 6.2 earthquake - Solomon Sea, Papua New Guinea

mapped
Strong magnitude 6.2 earthquake at 35 km depth

Date & time: Nov 18, 2021 14:08:05 UTC
Local time at epicenter: Friday, Nov 19, 2021 12:08 am (GMT +10)
Magnitude: 6.2
Depth: 34.9 km
Epicenter latitude / longitude: 5.3134°S / 153.7363°E↗ (Solomon Sea, Papua New Guinea)