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Mon, 21 Jan 2019
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Earthquakes

Seismograph

Earthquake of magnitude 5.6 felt across northern Venezuela

People stand on the street after an earthquake was felt across northern Venezuela
© REUTERS/Manaure Quitero
People stand on the street after an earthquake was felt across northern Venezuela, in Caracas, Venezuela December 27, 2018.
An earthquake with a magnitude of 5.6 hit northern Venezuela early on Thursday, the United States Geological Survey (USGS) said, with witnesses reporting tremors more than 100 km (60 miles) from the epicenter. The quake was recorded 4 km northeast of San Diego at 0859 GMT at a depth of about 10 km, according to the USGS website.

"The whole house shook," said a witness in Club de Campo, 102 km from the epicenter, in a posting on the European-Mediterranean Seismological Centre (EMSC) website.

Another witness said the quake lasted five or six seconds.

There were no immediate reports of casualties or significant damage.

Seismograph

Very shallow M5.5 earthquake hits Zimbabwe and Mozambique

Zimbabwe earthquake
An earthquake with a preliminary magnitude of 5.5 has struck the border of Zimbabwe and Mozambique, with shaking felt as far away as Harare, seismologists say. There was no immediate word on damage or injuries.

The tremor, which struck at 7:37 a.m. on Saturday, was centered near Espungabera in central Mozambique, about 54 kilometers (33 miles) southeast of Chipinge and 92 kilometers (57 miles) northwest of Massangena.

The U.S. Geological Survey (USGS) puts the magnitude at 5.5 with a depth of 7.6 kilometers (4.7 miles), making it a very shallow earthquake. The European-Mediterranean Seismological Centre puts the magnitude at 5.6.

There was no immediate word on damage or casualties, but the USGS estimates that up to 21 million people could have felt the earthquake, including 274,000 people who may have felt "strong" to "very strong" shaking.

"Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction," the USGS said in its assessment. "Some casualties and damage are possible and the impact should be relatively localized."

Seismograph

Etna volcano hit by a 4.8 magnitude earthquake

etna
The volcano, which began erupting on Monday, is on the outskirts of the city of Catania, on the east coast of Sicily.

On Wednesday, residents near Mt Etna were told to flee after a larger earthquake measuring 4.8 magnitudes struck about two kilometres underground.

Its epicentre was between the towns of Viagrande and Trecastagni.

Two people have been reportedly injured.

Buildings have been damaged in the area, with tremors felt in Catania, where around 300,000 people live.

Attention

Italy's Mount Etna erupts, authorities close airport

ETNA
Italy's Mount Etna, Europe's highest and most active volcano, erupted on Monday, sending a huge column of ash into the sky and causing the closure of Catania airport on Sicily's eastern coast.

A chain of around 130 earth tremors have rocked the volcano since around 0800 GMT on Monday, Italy's National Institute for Geophysics and Volcanology said, with the strongest posting a magnitude of 4.0.

There were no reports of any injuries.

The 3,330 meter high volcano can burst into spectacular action several times a year, spewing lava and ash high over the Mediterranean island. The last major eruption was in 1992.


Seismograph

Shallow magnitude 6.1 earthquake hits off east coast of Russia

earthquake
Most important Earthquake Data:

Magnitude : 6.1

Local Time (conversion only below land) : Unknown

GMT/UTC Time : 2018-12-24 12:41:19

Depth (Hypocenter) : 10 km

Seismograph

6.4-magnitude earthquake hits off coast of Tonga: USGS

Tonga earthquake
© USGS
The quake struck at a moderate depth of 100 km with the epicentre some 85 km north of the Tongan capital Nuku'alofa.
A 6.4-magnitude earthquake hit in waters off the Pacific island nation of Tonga on Monday (Dec 24), the US Geological Survey said, but no tsunami warning was issued.

The quake struck at a moderate depth of 100km with the epicentre some 85km north of the Tongan capital Nuku'alofa.

There were no immediate reports of damage.

The Pacific Tsunami Warning Centre said there was no tsunami threat.

Baea Filimoehala from the reception at the Emerald Hotel in Nuku'alofa told AFP there was no damage in the capital, describing the quake as a "small one".

Seismograph

6.0-magnitude quake hits 105 km WNW of Sola, Vanuatu

earthquake
An earthquake of 6.0 magnitude jolted 105 km WNW of Sola, Vanuatu on Saturday, the U.S. Geological Survey (USGS) said.

The epicenter, with a depth of 47.71 km, was initially determined to be at 13.4354 degrees south latitude and 166.6871 degrees east longitude.

Seismograph

Tsunami warning issued after shallow 7.5 magnitude earthquake strikes off Russia's Kamchatka

map quake
A tsunami warning has been issued for the coastal areas of Russia's Far East after a strong earthquake off the coast of Kamchatka. Waves are said to be possible within 300 kilometers of the epicenter.

The quake was registered on Friday morning local time, at the depth of 33 kilometers (20 miles) under the Bering Sea, some 80 kilometers east of the coast of Kamchatka.

There was no threat as of yet to Alaska, the continental US, or Hawaii, the US government's Pacific Tsunami Warning Center said.

Seismograph

Strong earthquake struck Machu Picchu in 1450 interrupting construction and helping perfect design

Machu Picchu

The separation of stone blocks at Machu Picchu is due to an earthquake of at least magnitude 6.5 that struck around the year 1450.
Construction of Machu Picchu was interrupted around 1450 by a powerful earthquake, leaving damage still evident today and prompting the Inca to perfect the seismic-resistant megalithic architecture that is now so famous throughout Cusco, according to a major new scientific study revealed by Peru's state-run news agency Andina.

The Cusco-Pata Research Project determined that a temblor of at least magnitude 6.5 struck during the reign of the 9th Inca Pachacutec while he was building his now iconic summer estate atop the saddle-ridge between two craggy mountain peaks.

The multidisciplinary research project began in 2016, led by the Geological, Mining and Metallurgical Institute (Ingemmet), with the participation of experts from the United Kingdom, France and Spain.

"What we can see is that there was already construction underway with one type of architecture under Pachacutec," said the project coordinator Carlos Benavente. "Then, we believe in the middle of that construction of Machu Picchu, there was a major earthquake."

Comment: As noted in Massive flooding in Europe during the Little Ice Age It appears the earthquake occurred during a fairly tumultuous period on our plane:
Climate historians estimate that major flooding on an unpredictable but increasingly frequent basis started as early as 1250. Extreme events like the Grote Mandrake flood of 1362 which killed at least 100,000 people became darkly repetitive.
The Little Ice Age, that is considered to have begun around the 13th century, stretching all the way into the 20th, and which afflicted much of the planet, was clearly accompanied by a much more diverse collection of catastrophic events, in Little Ice Age foiled Europeans' early exploration of North America it says:
Starting in the late 16th century, a series of volcanic eruptions likely chilled the Northern Hemisphere by as much as 1.8 degrees Celsius below the long-term average, White says.
Did events like these drive the Inca's to create their self-sustaining civilization in the sky?

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Seismograph

Intense earthquake swarm in Mt. Herðubreið continues, strong quake in Bárðarbunga, Iceland

Herðubreið A solitary extinct volcano which towers over the surrounding highland desert.
© Ólafur Már
Herðubreið A solitary extinct volcano which towers over the surrounding highland desert.
An intense earthquake swarm in Mt. Herðubreið in the NE Central Highlands shows no sign of slowing down. Nearly two hundred quakes have been detected just south of the volcano since the swarm began shortly after nine yesterday morning. At quarter to seven yesterday evening the Herðubreið swarm was joined by a 3.4 magnitude quake in the central caldera of the Bárðarbunga system.

The Icelandic Meteorological Office located the epicenter of the 3.4 magnitude Bárðarbunga quake at a depth of only 800 m (o.5 mi) in the NE part of the caldera. A second 3.6 magnitude quake was detected in the same area on Monday morning.