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Earthquakes


Seismograph

Tonga region hit by magnitude 6.2 earthquake just weeks after huge volcanic eruption and tsunami devastated the islands

A magnitude 6.2 earthquake has struck an area of the Pacific Ocean located around 130 miles from the island of Lifuka, which forms part of Tonga

A magnitude 6.2 earthquake has struck an area of the Pacific Ocean located around 130 miles from the island of Lifuka, which forms part of Tonga
Tonga has been rocked by a magnitude 6.2 earthquake, just weeks after a devastating volcanic eruption and tsunami.

The quake struck 130 miles west of the island of Lifuka around 7.40pm local time on Thursday, the United States Geological Survey said.

Lifuka is part of the low-lying Haʻapai Islands chain which was hard-hit in the Hunga-Tonga eruption, with several of the islands seeing all their buildings swept away in the subsequent tsunami.

There was no immediate word on damage from Thursday's earthquake, with communications in the region still badly disrupted after the eruption severed an underwater internet cable that is still being repaired.

However, the National Weather Service located in nearby American Samoa said no tsunami had been caused - meaning any damage is likely to be limited.

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Haiti earthquakes kill two, send residents flooding into the streets

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Haiti was struck by a 5.3 magnitude earthquake and a series of smaller tremors on Monday that killed two people and led panicked residents of the Caribbean nation's southern peninsula to flood into the streets.

The U.S. Geological Survey reported that the first quake hit an area near the city of Les Cayes and was followed by tremors of 4.4 and 5.1 in the same area, just six months after a major tremor in the same region killed more than 2,000 people.

One person died in Fond des Nègres and a second in Anse-à-Veau, where 35 homes were destroyed, Haiti's civil protection authority said in a tweet, adding that a road and a bridge had also been destroyed.

Jean Robert Léger, a resident of the town of Pestel on the southern peninsula, said the impact appeared to be minimal.

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Magnitude 6 earthquake - South Atlantic Ocean, South Sandwich Islands

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Very strong magnitude 6.0 earthquake at 11 km depth

Date & time: Jan 25, 2022 01:24:33 UTC - 10 hours ago
Local time at epicenter: Monday, Jan 24, 2022 11:24 pm (GMT -2)
Magnitude: 6
Depth: 11.0 km
Epicenter latitude / longitude: 55.388°S / 28.7949°W

Bizarro Earth

Why no one is freaking out about the looming massive earthquake threat in the Pacific Northwest

A monstrous earthquake in the Pacific Northwest is a certainty. We just don't know when.
Earthquake Illustration
© FINGERMEDIUM / GETTY IMAGES
For many people, natural disasters inspire both fascination and fear. They're a sign of nature's power to not only create, but also destroy. At the same time, they're a reminder of the human potential for ingenuity when it comes to protecting ourselves from the forces we cannot control.

In this case, there are two opposing forces: the North American Plate, an enormous tectonic plate that carries the entire continental United States on its back, versus the 90,000-square-mile Juan de Fuca Plate, located in the ocean off Washington, Oregon, and Northern California. For the past 200 million years, these two have been squaring off in an epic wrestling match in an area known as the Cascadia Subduction Zone, or CSZ. Trust us, nobody wants to see the end of this round. Yet only a few people seem truly bothered: seismologists, emergency management professionals, and those who have experienced earthquakes before.

It's certain that the Northwest will experience a devastating earthquake again, says Chris Goldfinger, an oceanographer at Oregon State University and one of the world's leading experts on subduction zone earthquakes. "We have no idea of the timing and how urgent it is," Goldfinger tells Pop Mech. "People tend to ignore it in that case." The majority of the public, as well as most governments in the Northwest, aren't yet pushing to implement the extensive infrastructure changes and early-warning communications systems needed to save tens of thousands of lives.

The Juan de Fuca Plate has been steadily pushing against the Pacific Coast as it slides beneath the North American Plate. But the roughly 47-million-square-mile North American Plate isn't budging. Instead, it's locked tightly against the Juan de Fuca's surface.

Seismograph

Magnitude 6.2 earthquake strikes near Unalaska, Alaska

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A magnitude 6.2 earthquake struck south of Unalaska in Alaska, a major fishing port with 4,700 full-time residents, on Friday, the Alaska Earthquake Center at the University of Alaska Fairbanks said.

The quake struck at 8:17 p.m. (0517 GMT on Saturday), the center said.

The United States Geological Survey (USGS), which registered the quake at 6.2 magnitude, said it struck 74 km (46 miles) south of Unalaska at a depth of 3 km (2 miles).

The U.S. Tsunami Warning System said there was no tsunami warning after the quake.

(Reporting by Akriti Sharma in Bengaluru and Yereth Rosen; Editing by William Mallard)

Source: Reuters

Seismograph

Magnitude 6 quake strikes Talaud Islands, Indonesia

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An earthquake of magnitude 6 struck the Talaud Islands in Indonesia on Saturday, the GFZ German Research Center for Geosciences (GFZ) said.

The quake was at a depth of 24 km (15 miles), GFZ said.

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Magnitude 6.3 earthquake shakes Japan

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A magnitude-6.3 offshore earthquake occurred off the east coast of Kyushu at around 01:08 JST Jan. 22.

The epicenter was about 24 km (15 miles) south-southeast of Saiki, Japan.

Strong shaking was probably felt in areas of southern Japan near the epicenter, particularly in eastern Kyushu.

The temblor did not immediately prompt the US Tsunami Warning System to issue a tsunami warning, advisory, watch, or threat. No casualties or damage were immediately reported in connection with the earthquake.


Bizarro Earth

Tonga volcano eruption created puzzling ripples in Earth's atmosphere


Comment: We're through the looking glass here people!


Powerful waves ringing through the atmosphere after the eruption of Hunga Tonga-Hunga Haʻapai are unlike anything seen before.
Hunga Tonga–Hunga Haʻapai
© NOAA
The US National Oceanic and Atmospheric Administration’s GOES-West satellite captured the explosive eruption of Hunga Tonga–Hunga Haʻapai.
Scientists are racing to understand a puzzling series of massive ripples in Earth's atmosphere triggered by the eruption of the Tongan volcano at the weekend. Satellite data shows that the event — which some fear might have devastated the Pacific-island nation — provoked an unusual pattern of atmospheric gravity waves. Previous volcanic eruptions have not produced such a signal, leaving experts stumped.

"It's really unique. We have never seen anything like this in the data before," says Lars Hoffmann, an atmospheric scientist at the Jülich Supercomputing Centre in Germany.

The discovery was made in images collected by the Atmospheric Infrared Sounder (AIRS), mounted on Nasa's Aqua satellite, in the hours after the eruption of the Hunga Tonga-Hunga Haʻapai volcano on 14 January.

They show dozens of concentric circles, each representing a fast-moving wave in the gases of the atmosphere, stretching for more than 16,000 kilometres. The waves reached from the ocean surface to the ionosphere, and researchers think that they probably passed around the globe several times.

Seismograph

Twin earthquakes in western Afghanistan kill at least 22

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Two earthquakes rattled Afghanistan's western Badghis province along the border with Turkmenistan on Monday afternoon, killing at least 22 people, a local official said.

There were fears the death toll could rise further as the first rescuers reached some of the remote villages struck by the tremors in what is one of Afghanistan's most impoverished and underdeveloped regions.

Chief of the province's culture and information department, said scores of homes were destroyed in the quakes.

The US Geological Survey registered a magnitude 5.3 quake at 2 p.m. and a second, magnitude 4.9 at 4 p.m. local time. They struck 41 kilometers (25 miles) east and 50 kilometers (31 miles) southeast of Qala-e-Naw, the provincial capital.


Seismograph

Magnitude-6.1 earthquake hits Papua New Guinea

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A day after Tonga was hit by giant waves following the eruption of a volcano in the ocean off its coast, a 6.1 magnitude earthquake has struck the island of Papua New Guinea, the US Geological Survey (USGS) has said.

The epicenter of the quake was located in the autonomous Bougainville region, at a depth of 408 kilometers (253 miles), according to the agency. The European Mediterranean Seismological Centre (EMSC) also registered the quake, putting its magnitude at 5.8. There have so far been no reports either of casualties or significant damage.

Papua New Guinea, a country of nine million, occupies the eastern half of the island of New Guinea and a group of smaller islands in Melanesia, north of Australia.