Welcome to Sott.net
Sun, 25 Oct 2020
The World for People who Think

Earthquakes

Attention

Weakening of Earth's magnetic field probed

Earth’s magnetic field
© Aubert et al./IPGP/CNRS Photo library
A simulation of the Earth’s magnetic field.
Geophysicists have been puzzling over a gradual weakening of the Earth's magnetic field in an area stretching from Africa to South America, which has resulted in technical disturbances in satellites orbiting Earth.

Scientists have resorted to data from the European Space Agency's (ESA) Swarm constellation to probe the disturbing weakening of Earth's magnetic field in the area known as the "South Atlantic Anomaly".

Jurgen Matzka, from the German Research Centre for Geosciences, and a team of experts from the Swarm Data, Innovation and Science Cluster (DISC) have been using data from ESA's Swarm satellite constellation to identify and measure the different magnetic signals that comprise Earth's magnetic field.
"The new, eastern minimum of the South Atlantic Anomaly has appeared over the last decade and in recent years is developing vigorously. We are very lucky to have the Swarm satellites in orbit to investigate the development of the South Atlantic Anomaly. The challenge now is to understand the processes in Earth's core driving these changes," said Matzka.

Seismograph

Magnitude 5.7 quake kills one, injures 18 in eastern Turkey

A view of a collapsed house in Turkey's eastern province of Bingol on June 14, 2020.
© AA
A view of a collapsed house in Turkey's eastern province of Bingol on June 14, 2020.
Rescue and relief operation going on as quake hits Bingol province, damaging several houses and collapsing military watchtower, officials say.

An earthquake with a 5.7 magnitude shook Bingol province in eastern Turkey on Sunday, killing one and injuring 18 people and causing the collapse of a military observation tower, officials said.

Interior Minister Suleyman Soylu said that 18 people were injured and one security guard died in the earthquake that struck eastern Karliova district at 1424 GMT.

Some 10 homes have been partially damaged in Elmali and Dinarbey villages of Yedisu district, said Bingol Governor Kadir Ekinci.


Seismograph

6.2-magnitude earthquake hits near Northern Mariana Islands

quake
An earthquake with a magnitude of 6.2 jolted 415 km north of Saipan, Northern Mariana Islands at 21:08:30 GMT on Saturday, the U.S. Geological Survey said.

The epicenter, with a depth of 614.72 km, was initially determined to be at 18.9196 degrees north latitude and 145.1144 degrees east longitude.

Seismograph

Magnitude 6.0 earthquake strikes NE Taiwan

Taiwan earthquake map
A magnitude 6.0 earthquake struck off the coast of northeast Taiwan at 4:19 a.m. this morning (June 14), according to the Central Weather Bureau (CWB).

The epicenter of the temblor was located 85.3 kilometers southeast of Yilan County Hall at a focal depth of 54.8 km, according to CWB data. Taiwan uses an intensity scale of 1 to 7, which gauges the degree to which a quake is felt at a specific location.

The quake's intensity registered as a 3 in Yilan County, Hualien County, Nantou County, Hsinchu County, Taitung County, Yunlin County, and Chiayi County. An intensity level of 2 was registered in Taipei City, Taoyuan City, Keelung City, Taichung City, New Taipei City, Miaoli County, Changhua County, Chiayi City, Kaohsiung City, and Tainan City.

A lesser intensity of 1 was felt in Hsinchu City, Pingtung County, and Penghu County. No injuries resulting from the quake had been reported at the time of publication.

Seismograph

Magnitude 6.7 earthquake hits near Japan's Ryukyu Islands

earthquake Japan June 2020
© European-Mediterranean Seismological Centre
6.7 magnitude earthquake near the southern Japanese islands of Ryukyu.
A 6.7 magnitude earthquake has occurred at sea, near the southern Japanese islands of Ryukyu. So far, no tsunami warning has been issued. A powerful tremor was detected off the coast early on Sunday, the country's weather agency said. The epicenter is estimated to be around 160 km below the surface.

Despite the depth, the quake was felt in Okinawa, as well as Japan's southernmost main island of Kyushu, according to local media. No information on possible damage or casualties was immediately available.

Seismograph

Why does Delhi keep getting hit by frequent earthquakes?

Delhi earthquake swarm
© temblor
On Monday afternoon, the capital city of India witnessed yet another low-intensity earthquake. The National Center for Seismology revealed the epicentre of the earthquake was near Gurgaon, Haryana, and its depth was recorded to be 19 km with a magnitude of 2.1. Mild tremors were reportedly felt in Delhi, Noida, and the surrounding areas for a few seconds.

Just a week ago, on June 3, Delhi NCR had witnessed another earthquake of magnitude 3.2 on the Richter scale, which struck 19 km southeast of Noida. Further back, on May 29, an earthquake measuring 4.6 on the Richter scale jolted the NCR.

Since April 2020, New Delhi and nearby areas have recorded more than 14 earthquakes. According to the National Center for Seismology, all these earthquakes fell into the range of low to medium, as their magnitude was less than five.

This phenomenon, involving a collection of related earthquakes focused on a particular area for a limited period, is called 'swarm' activity. The swarm activity may or may not have an apparent triggering event behind it: say a large earthquake or a huge landslide.

Seismograph

Shallow 6.0 magnitude earthquake hits Southern Mid Atlantic Ridge

quake
Magnitude Type: mww

USGS page: M 6.0 - 785 km W of Jamestown, Saint Helena

USGS status: Reviewed by a seismologist

About 14 hours ago 6.0 magnitude, 10 km depth
Southern Mid Atlantic Ridge

Seismograph

5.7 magnitude earthquake hits Iran; tremors felt in Qatar

Iran earthquake
© Qatar Weather/Twitter
Qatar Seismic Network recorded 5.7 magnitude earthquake at southwest part of Iran on June 9, 2020 at 8:18pm Qatar time.

The Iran news agency IRNA confirmed that a 5.7 magnitude earthquake struck Fars province on Tuesday.

"Tremors were felt in the eastern coast of Qatar and is expected to be felt in many neighbouring countries which are close to the epicentre," Qatar Meteorology Department tweeted.

Seismograph

'It sounded like an explosion': Scottish village left shaken by M2.2 earthquake

The tremor was recorded at Earthquake House

The tremor was recorded at Earthquake House
The British Geological Survey (BGS) is asking residents in Perthshire who felt today's earthquake to report their experiences.

A seismic event measuring 2.2 on the Richter scale was recorded near Comrie at around 3.20pm this afternoon.

Residents in Comrie reported hearing a "really loud bang" while one person said "it sounded like an explosion".

The BGS appealed on Twitter for residents to fill out a questionnaire on its website to give it "valuable data".

Hundreds of Perthshire residents took to social media to report feeling the earthquake.

On Facebook, one person said the thought a "massive truck just hit my building," while another said said "it was the biggest tremor I have ever felt having lived here my whole life".

Seismograph

Earthquake of 6.5 magnitude hits eastern Indonesia

quake
An earthquake of magnitude 6.5 struck north of Halmahera near the province of North Sulawesi in Indonesia on Thursday, the GFZ German Research Center for Geosciences (GFZ) said.

Indonesia's national weather and climate agency (BMKG) gave a magnitude of 7.1 and depth of 111 km. The GFZ put the quake's depth at 105 km.

BMKG spokesman Taufan Maulana told Reuters no damage had been caused and the earthquake did not pose a tsunami threat.

Indonesia is situated on the Pacific Ring of Fire, which is frequently hit by earthquakes that are sometimes accompanied by tsunamis.

Source: Reuters