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Mon, 02 Aug 2021
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Earthquakes

Seismograph

M6.1 earthquake hits eastern Indonesia

earthquake graph
© Phil McCarten / Reuters
An earthquake with a magnitude of 6.1 on the Richter scale struck off the coast of Indonesia's Sulawesi island Saturday, said the United States Geological Survey.

As per reports, the strong quake hit 258 kilometres (160 miles) northeast of the city of Manado in North Sulawesi at a depth of 68 kilometres.

Indonesia experiences frequent quakes due to its position on the Pacific "Ring of Fire", an arc of intense seismic activity where tectonic plates collide that stretches from Japan through Southeast Asia and across the Pacific basin.

Earlier, in January, more than 100 people were killed while thousands left homeless by a 6.2-magnitude quake that struck Sulawesi.

Seismograph

M6.0 earthquake & dozens of aftershocks rattle northern California

The aftermath of an earthquake is seen on California's Highway 395
© Twitter / @brettdurrant / screenshot
The aftermath of an earthquake is seen on California's Highway 395 in images shared to social media, including large boulders that landed on the road after they were dislodged by the the tremor.
A powerful 6.0 magnitude earthquake and dozens of aftershocks have struck the California-Nevada border area, triggering a rockslide in the Sierra Nevada mountain range and reports of shaking from San Francisco to Carson City.

The most powerful jolt, eventually upgraded by the US Geological Survey (USGS) to magnitude 6.0, happened at 3:49pm local time on Thursday, some 150 miles east of Sacramento. Within the next two hours, the area was rattled by over 50 aftershocks ranging between 2.5 and 4.6 on the Richter scale.

The quake was the "result of normal faulting in the shallow crust of the North America plate," USGS said, noting however that there is a small chance this was a foreshock of a larger earthquake, according to CBS Sacramento.


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Two shallow magnitude 6 earthquakes strike off the coast of Chile within half an hour

quake
6.0 magnitude earthquake 89 km from Vallenar, Atacama, Chile

UTC time: Sunday, July 04, 2021 01:01 AM

USGS page: M 6.0 - 89 km WSW of Vallenar, Chile

USGS status: Reviewed by a seismologist

Reports from the public: 26 people

10 km depth

Seismograph

6.1 magnitude earthquake hits Fiji region

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The US Geological Survey said that an earthquake with a magnitude of 6.1 hit the Fiji region.

The earthquake hit at around 20:14:38 GMT on Friday.

The epicenter, with a depth of 605.63 km, was initially determined to be at 21.8295 degrees south latitude and 179.3622 degrees west longitude, the Xinhua news agency reported.

No casualties have been reported.

Seismograph

M6.0 earthquake in Peruvian capital interrupts news broadcasts and sends people fleeing their homes

Peru earthquake
© @deZabedrosky / Twitter
Peru's capital, Lima was hit by a magnitude-6.0 earthquake on Tuesday night. The tremors were caught on live TV and caused people to run to the streets.

According to the Geophysical Institute of Peru, the epicenter was located 33km southwest of the town of Mala in Lima Region. Strong tremors were felt in the capital as well.

The sudden tremors interrupted several live interviews on TV, with newscasters instructing everyone to remain calm.


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6.0-magnitude earthquake hits Kermadec Islands, New Zealand - 2nd strong quake within 24 hours

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An earthquake with a magnitude of 6.0 jolted Kermadec Islands, New Zealand, at 11:14:12 GMT on Monday, the U.S. Geological Survey said.

The epicenter, with a depth of 27.01 km, was initially determined to be at 30.3301 degrees south latitude and 177.4501 degrees west longitude.

Comment: The earlier event: Strong shallow magnitude 6.3 earthquake shakes New Zealand's Kermadec Islands


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Strong shallow magnitude 6.3 earthquake shakes New Zealand's Kermadec Islands

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A magnitude 6.3 earthquake shook the area around New Zealand's Kermadec Islands early Monday, the US Geological Survey reported.

The quake, which struck at 1705 GMT Sunday, had an epicentre located 938 kilometers northeast of Ngunguru, on New Zealand's North Island, at a depth of 10 kilometers, the USGS said.

There were no immediate reports of damage or a tsunami. The tiny Kermadec Islands are mostly uninhabited.

Source: AFP

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Shallow M6.1 earthquake strikes Indonesia's Moluccas islands

Earthquake graph
© Sputnik / Gennady Ratushenko
Hundreds of people near Indonesia's Moluccas islands rushed to higher ground on Wednesday after an earthquake of magnitude 6.1, fearing aftershocks and a possible tsunami.

The quake struck at a depth of 19 km (11 miles). There were no immediate reports of casualties.

Indonesia's Meteorology and Geophysics Agency (BMKG) urged people in a text message to move away from beaches and seek higher ground, noting that the warning applied especially to Seram Island.

BMKG had initially said a tsunami triggered by the movement of tectonic plates was unlikely - but then said one could still be triggered by underwater landslides, of which there would be no warning.

"If the tsunami is caused by an underwater landslide, it cannot be detected from the current early warning system," the head of BMKG, Dwikorita Karnawati,told a news conference.

Seismograph

Earthquake swarm shakes Oregon's Mount Hood

Mount Hood earthquake swarm
© Pacific Northwest Seismic Network
Two earthquakes hit Saturday near Government Camp, Oregon, one of them topping out at magnitude 3.9.

The tremors were strong enough for some locals to feel it, The Oregonian reported.

The earthquake rumbled at 8:51 p.m. June 5, just south of the summit of Mount Hood. It was preceded by several earthquakes in the hour before the quake, and tens of aftershocks have occurred since, the Cascades Volcano Observatory of the U.S. Geological Survey reported in a news release Saturday night.

The volcanic action and location are consistent with past swarms in the Mount Hood area, including a magnitude 4.5 on June 29, 2002, that was located about 1 mile east of Saturday's ground shaker.

Aftershocks will likely continue for hours or days, some of which may be felt, according to the news release.

Comment: A few days ago a significant earthquake swarm hit southern California.


Seismograph

Significant earthquake swarm impacting southern California

A swarm of earthquakes is currently impacting southern California
© USGS
A swarm of earthquakes is currently impacting southern California
A significant earthquake swarm is unfolding in southern California, impacting the area around the Salton Sea east of San Diego, south of Palm Springs, and southeast of Los Angeles. 47 earthquakes with a magnitude of 2.5 or greater have struck the area, with the strongest being a 5.3 which struck at 10:55am local time today.

The strong 5.3 earthquake struck about 6 and a half miles west of Calipatria at a depth of 3.6 miles. More than 700 residents from Los Angeles to San Diego to El Centro reported experiencing the quake to the USGS, including many that reported "strong shaking."

Today's significant earthquake swarm is occurring near the Salton Sea, a shallow landlocked lake with a high salt concentration in Riverside and Imperial counties of California. The Salton Sea sits on the San Andreas Fault at the southern end of the state of California. In this region, the Earth's crust is being stretched. Today's earthquakes are tied to submerged faults near the southern end of the San Andreas Fault. Called the Brawley seismic zone, this extensional region connects the San Andreas with the Imperial Fault in southern California.

Today's swarm comes on the heels of another earthquake swarm that impacted the Disney Land area last weekend north of today's swarm.