Earthquakes around the world

c.a.

The Living Force
FOTCM Member
M 6.7 - 15km SSW of Coquimbo, Chile
2019-01-20 01:32:51 (UTC)
30.074°S 71.423°W
53.0 km depth

7,800 aftershocks
Snip:10-12 minute Read
ANCHORAGE, Alaska (AP) — Seven weeks after a massive earthquake rocked Alaska, aftershocks are still shattering 7-year-old Connor Cartwright’s sense of safety.

They shake the earth far less than the 7.0 magnitude quake that sent a mirror, TV and dishes crashing to the ground in the Anchorage home where Connor lives with his mother, father and 11-year-old brother.

But the seemingly never-ending aftershocks deepen quake anxiety for the second-grader and many other Alaska residents in the wide swath of the state shaken by the Nov. 30 quake.

When the big aftershocks hit, Connor fears his home will collapse.

“I feel like the house won’t hold up,” he said.

Many of the aftershocks are so small that people don’t notice them, like a recent one that Connor didn’t feel at school — but his teacher made all the students dive under their desks to be safe.

The latest big aftershock happened last Sunday — a magnitude 5.0 jolt that flared already frayed nerves and prompted panicky posts on social media.

That one “reminded people again that it’s not over yet,” said seismologist Natalia Rupert at the Alaska Earthquake Center
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M6.7 Earthquake Chile region.. Earthquake update for 1/19/2019
Published on Jan 19, 2019 / 14:48
 

c.a.

The Living Force
FOTCM Member
Major destruction documented by Sismologia Chile,‏ with numerous after shocks! Update's on going.
Sismologia Chile (@SismologiaCh) | Twitter

Translated from Spanish by Microsoft
⚠ Shocking | Walls collapse in the sector of Peñuelas and cause serious damage in the surrounding houses after strong earthquake of greater intensity (VIII).

Translated from Spanish by Microsoft
⚠ #NACIONAL| This was the bridge of the Recoleta Reservoir after the powerful earthquake of magnitude 6.7 MW (intensity VIII) that affected the region #Coquimbo.

Interesting that EMSC has been shut down do to an electrical problem since the 18th.

 

c.a.

The Living Force
FOTCM Member
Some recent data on the Chile Quake. EMSC still struggling with it's Linux operating systems crash.

5-6 minute Read
Earthquake researchers measuring the movement of the Earth's surface with the Global Positioning System (GPS) have concluded that the Northridge earthquake has continued in a "quiet" way and the Granada Hills have risen about 16 centimeters (about 6 inches) since that first jolt in January 1994.

Scientists from NASA's Jet Propulsion Laboratory will present their findings this week at the annual Fall meeting of the American Geophysical Union in San Francisco.

"The Northridge quake occurred on a thrust fault that did not break all the way to the surface. However, the sedimentary layers of rock, in the top five kilometers located just below the surface near the epicenter, have continued to move in a fluid- like manner -- sort of like honey flowing off a spoon -- since the earthquake," said Dr. Gregory Lyzenga, a JPL geophysicist and professor at Harvey Mudd College, Claremont, CA. "The amount of motion that happened because of this 'stealth' earthquake is equivalent to the displacement that would accompany a magnitude 6.0 earthquake."
Translated from Spanish by Microsoft
The quake tonight in #Coquimbo, Chile, had moderate magnitude but high intensity (strong shaking). Broke to the inside of the Nazca plate, not in contact with the South American Plate. These "intraplate" earthquakes are usually very energetic (https://www.researchgate.net/publication/223707244_Intraplate_and_interplate_earthquakes_in_Chilean_subduction_zone_A_theoretical_and_observational_comparison …)

 

angelburst29

The Living Force
FOTCM Member
January 21, 2019 - Quake of magnitude 6 strikes South of Indonesia's Sumbawa: USGS
Magnitude 6 quake hits Indonesia, no immediate reports of damage | Reuters

An earthquake of magnitude 6 struck south of the city of Raba on Indonesia’s central island of Sumbawa on Tuesday, the U.S. Geological Survey said.

There was no immediate tsunami warning or reports of damage or casualties from the quake, which hit at a depth of 25 km (16 miles) about 219 km (136 miles) south of Raba in the east of Sumbawa, which forms part of West Nusa Tenggara province.
 

sToRmR1dR

The Living Force
FOTCM Member
6.4 earthquake strikes south of Indonesia's island of Sumbawa - USGS
22 Jan, 2019

A 6.4-magnitude earthquake has struck 143 miles south of the Indonesian town of Raba, according to the US Geological Service. There are no immediate reports of damage or casualties, and no tsunami warning has been issued.

The quake hit on Sunday at depth of 16 miles, south of the central Indonesian island of Sumbawa. It followed a magnitude-6 earthquake in the same area, according to the USGS. No tsunami warning has been issued.

Sumbawa is the sixth-largest Indonesian island, encompassing 5,965 square miles. It is part of West Nusa Tenggara province, and was inhabited by 1.39 million people in 2014.

Indonesia is a disaster-prone archipelago located in the seismically active Pacific ‘Ring of Fire.’

The country has suffered a series of deadly earthquakes and tsunamis in recent years, which claimed the lives of more than 3,000 people.
 

Gawan

Ambassador
Ambassador
FOTCM Member
There happened a relatively strong earth quake (4,6) in Poland today and also in the same region already on the 12th January (3,9), where one man died in a pit. It was also felt in some parts of Eastern Germany.
 

mabar

The Living Force
FOTCM Member
https://phys.org/news/2019-01-earthquake-super-slo-mo.html said:
Earthquake in super slo-mo
January 30, 2019, Helmholtz Association of German Research Centres

A big earthquake occurred south of Istanbul in the summer of 2016, but it was so slow that nobody noticed. The earthquake, which took place at mid-crustal depth, lasted more than 50 days. A novel processing technique applied to data from special borehole strainmeter instruments and developed by researchers from the GFZ German Research Centre for Geosciences and collaborators successfully identified the ultra-slow quake below the Sea of Marmara. The team, led by Patricia Martínez-Garzón, has published the results in Earth and Planetary Science Letters.

The region south of Istanbul is part of the North Anatolian Fault, separating Eurasia from the Anatolian plate. This geological fault is a large tectonic plate boundary known to generate destructive earthquakes causing large numbers of casualties. The last such major earthquake occurred in 1999 near Izmit, causing almost 20,000 fatalities. A portion of the fault, running just south of the densely populated mega-city of Istanbul, is currently identified as a "seismic gap," and is overdue to produce a large earthquake. While the tectonic loading due to plate motion is continuous, thereby constantly accumulating elastic energy on faults, the release of the stored energy can occur either seismically in the form of earthquakes, or aseismically during fault creep or slow deformation at depth.

Understanding the interaction between both phenomena is critically important to define the seismic hazard and subsequent risk in urban areas.

The study in Earth and Planetary Science Letters reports on a large, two-month-long ultra-slow earthquake that occurred south of Istanbul below the Sea of Marmara in conjunction with elevated moderate-sized seismicity at shallow depth in the region.

The researchers investigated the crustal deformation data from borehole instruments installed around the eastern Sea of Marmara as part of the GONAF Plate Boundary Observatory.

Data from one of the borehole strainmeter stations located in the most seismically active portion of the area on the Armutlu Peninsula was processed using novel computing techniques. Dr. Martínez-Garzón, lead-author of the study, says, "This allowed us to identify the slow slip signal that presumably occurred at mid-crustal depth level and that is of the same size as the largest ever seen such signal that occurred along the San Andreas Fault in California."

During this aseismic slow deformation signal, the shallower and typically fully locked part of the crust responded by producing the highest number of moderate earthquakes in years, indicating an interaction between near-surface and deep crustal deformation. Prof. Marco Bohnhoff, head of the GONAF observatory and a co-author of the study, says, "How this interaction works remains to be understood in detail. In any case, our results will allow us to better understand and quantify the regional seismic risk, in particular for the 15 million population center of Istanbul in the light of the pending big one."


More information: Patricia Martínez-Garzón et al, Slow strain release along the eastern Marmara region offshore Istanbul in conjunction with enhanced local seismic moment release, Earth and Planetary Science Letters (2019). DOI: 10.1016/j.epsl.2019.01.001
 

c.a.

The Living Force
FOTCM Member

Calm before the storm? Earthquake update 1/30/2019
Published on Jan 30, 2019 / 14:11

Sidenote:
Translated from Spanish by Microsoft
⚠ now: A eruptive pulse is recorded in the volcanic complex #NevadosDeChillán, located in the region of #Ñuble, in #Chile, is maintained orange technical alert. Photo: @Sernageomin. #EQVT, #erupción, #eruption, #volcán, #volcano.

 

sToRmR1dR

The Living Force
FOTCM Member
Powerful 6.6 Magnitude Earthquake Hits Southern Mexico - Seismological Service
01.02.2019

People in the capital, Mexico City, were forced to leave office buildings and gather in the streets due to severe tremors that began at about 10 am local time (16:00 GMT).

A 6.6 magnitude earthquake was recorded in the morning of 1 February on the border between Chiapas, Mexico and Guatemala, the National Seismological Service reported. There were no immediate reports of major damage.

The United States Geological Survey (USGS) reported that the quake had its epicentre seven kilometres east-southeast of Mazatan, in the state of Chiapas, near the border with Guatemala, at a depth of 87 kilometres.


DETAILS TO FOLLOW
 

sToRmR1dR

The Living Force
FOTCM Member
Earthquake of 5.8 magnitude registered on border between Kazakhstan and China
February 02, 2019

ASTANA, February 2. /TASS/. An eathquake of 5.8 magnitude was registered on the border between Kazakhstan and China, spokesman for Kazakhstan's emergencies services Nursultan Nurakhmetov told reporters on Saturday.

"Seismic stations registered an earthquake on February 2 at 3:54am local time. The earthquake's epicenter lay in 616 km to the north-east from Almaty, on the border between Kazakhstan and China," Nurakhmetov said.

No injuries or damages have been reported.
 
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