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Earthquakes

Another earthquake in Scotland

Scotland hit by second earthquake in a week with Highland tremor​

Published1 hour ago
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Scotland has experienced its second earthquake in less than a week after the Highlands was hit by a tremor.
The British Geological Survey (BGS) said a 2.2 magnitude earthquake was registered just outside Roybridge, near Spean Bridge, at 09:29 on Friday.
The organisation said it had a depth of 7.5km (4.6 miles).
The survey said: "A small number of reports have been received by members of the public in Roybridge indicating they felt this event."
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https://www.bbc.co.uk/news/uk-scotland-highlands-islands-59359543
 
North California Quake

A 6.2 magnitude earthquake off the coast of Northern California rattled a wide swath of the state shortly after noon local time, according to data from the US Geological Survey.

The quake occurred just off Cape Mendocino near Humboldt County and was felt as far away as San Francisco and Chico, California.

"It was slow rolling at first, but then it really got going," Humboldt County Sheriff William Honsal tells CNN. "We haven't had a shake like this since 2010."

Humboldt County emergency responders are assessing damage but have had no word of injuries or catastrophic damage. Some minor damage to buildings, including broken glass, has been found, Honsal said.
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There was a Brummie tremor last night -
(Safe Birmingham Mail link)
Birmingham hit by earthquake - latest updates

Birmingham and the West Midlands have been hit by an earthquake overnight.

The earthquake struck at 10.59pm on Monday night with reports of sheds falling down and the walls of houses and flats shaking.

People were also jolted in their beds, as well as experiencing deep vibrating through floors, rumbling noises, loud bangs and small tremors.
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Escette who lives in the area slept through it.
 

7.3 Magnitude Quake Hits North Japan, Tsunami Alert Issued​


A powerful 7.3 magnitude earthquake shook off the coast of Fukushima in northern Japan on Wednesday evening, triggering a tsunami advisory.
The Japan Meteorological Agency said the quake struck 60 kilometers (36 miles) below the sea.

The agency issued a tsunami advisory for up to a meter (3-foot) sea surge in parts of Miyagi and Fukushima prefectures. NHK national television said the tsunami might have reached some areas already.

The quake shook large parts of eastern Japan, including Tokyo, where buildings shook violently.
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A radio report just now reported around 2 million people are now without power.
 

Earthquake hits Welsh village​

The epicentre was near a tiny village in Conwy, according to the British Geological Survey.
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People in Wales may have felt the ground move yesterday after it was confirmed that an earthquake hit the north of the country. The quake had a magnitude of 1.0 on the Richter scale and happened at 6.43am on Monday April 4. The epicentre was located 2km west of Trefriw in Conwy, according to the British Geological Survey, at a depth of 7km.


This was not the first earthquake to hit the British Isles in recent weeks. Days earlier on March 31 a tremor with a magnitude of 0.5 was recorded at Clodock in Herefordshire and on March 30 Mablethrope in Lincolnshire had a quake with a magnitude of 1.1.


The last time an earthquake with a magnitude of 1 struck North Wales was Snowdonia during October 2021. Then a “big rumble sound” was heard by communities in the Conwy Valley and beyond - waking dogs and shaking sofas.
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(C) WoL. '22
 

Scientists find evidence of largest earthquake in human history 3,800 years ago​


Scientists have found evidence that an earthquake 3,800 years ago in Northern Chile is the largest in human history, according to a new study.

The quake had a magnitude of around 9.5, prompting tsunamis that struck countries as far away as New Zealand and boulders the size of cars to be carried inland by the waves, according to researchers at the University of Southampton.

The largest known earthquake before the new study was the 9.5 magnitude Valdivia earthquake, which struck Southern Chile in May 1960, with a rupture zone that stretched up to about 621 miles along the country's coast, according to the U.S. Geological Survey.

Estimates of the death toll from the quake range from 1,655 to 5,700, along with leaving 3,000 injured, 2 million homeless and causing $550 million in economic damage in Southern Chile.

"But we have now found evidence of a rupture that's about 1,000 kilometers long just off the Atacama Desert coast and that is massive," said Goff, a visiting professor at the University of Southampton in Britain.

https://www.upi.com/Science_News/20...erful-as-biggest-ever-recorded/4581650394177/

maximus otter
 
maximus otter said:

Scientists find evidence of largest earthquake in human history 3,800 years ago​


Scientists have found evidence that an earthquake 3,800 years ago in Northern Chile is the largest in human history, according to a new study.

The quake had a magnitude of around 9.5, prompting tsunamis that struck countries as far away as New Zealand and boulders the size of cars to be carried inland by the waves, according to researchers at the University of Southampton.

The largest known earthquake before the new study was the 9.5 magnitude Valdivia earthquake, which struck Southern Chile in May 1960, with a rupture zone that stretched up to about 621 miles along the country's coast, according to the U.S. Geological Survey.

Estimates of the death toll from the quake range from 1,655 to 5,700, along with leaving 3,000 injured, 2 million homeless and causing $550 million in economic damage in Southern Chile.

"But we have now found evidence of a rupture that's about 1,000 kilometers long just off the Atacama Desert coast and that is massive," said Goff, a visiting professor at the University of Southampton in Britain.

https://www.upi.com/Science_News/20...erful-as-biggest-ever-recorded/4581650394177/

maximus otter
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Another rather misleading news story that emphasizes the wrong point. Nowhere does the paper say it was "the largest in human history". The model of the tsunami deposits and other data suggest that the Mw of 9.5 fits better than the Mw 9.2 but there isn't a way to be sure. A magnitude of 9.5 is about the biggest you CAN get considering fault lengths and the amount of energy that can be stored prior to rupture. So, the Valdivia earthquake was around this magnitude. The gist of the paper is that no one is planning for a giant quake that size in the northern part of Chile as they have in the southern part. And that it will be catastrophic when it happens again.
https://www.science.org/doi/10.1126/sciadv.abm2996
 
Timor-Leste hit by 6.4-magnitude earthquake that was felt in Darwin.

Quake struck to east of Timor-Leste, with residents in Northern Territory capital reporting strong shaking.

An earthquake with a preliminary magnitude of 6.4 struck off the coast of Timor-Leste and was so strong it was felt in Darwin, Australia.

The quake hit at 11.36am local time (12.06pm Darwin time), according to Geosciences Australia, and prompted some people in the capital of Dili to flee buildings, though a tsunami was ruled out.


There were no immediate reports of damage or casualties, but witnesses said the quake was felt strongly. A video shared on social media showed people exiting a shopping mall in Dili by stairs.

“It’s quite big,” Francez Suni, director of information of East Timor’s GMN TV, told Reuters in a text message.

“Our staff ran out of the building because it was shaking.”
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(C) The Guardian. '22
 
Shropshire earthquake: Thuds and shudders felt in 3.8 magnitude tremor.

A 3.8 magnitude earthquake has been recorded in Shropshire.
The British Geological Survey (BGS) said the tremor happened at a depth of 8km (5 miles), near Wem in the north of the county.
Residents of nearby towns and villages including Shrewsbury, Telford, and High Ercall, contacted the BBC with reports of their homes shaking.
One resident said her legs "turned to jelly" as she felt her bedroom floor shuddering beneath her.
Fire crews in Market Drayton said they also felt the tremor and urged people not to call emergency services unless someone was in danger.

BGS records said the tremor began shortly after 14:30 BST, with the epicentre just south of Market Drayton between the villages of Stanton upon Hine Heath, Weston-under-Redcastle and Hodnet.

Julie Williams lives in Wem and was upstairs when the earthquake hit. She said: "All I heard a thud and a shudder through the bedroom floor."
"I knew straight away what it was, I was just like, get downstairs and get out.

"It shocked me," she said. "My legs went to jelly."
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(C) BBC. '22
 
Floyd1 said:
Mass hysteria here on the local fb page. Me; meh.
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Someone somewhere in the area probably thought the earth had moved at the crucial time. Imagine. For the rest of the bloke's life he's going to be hearing "The earth didn't move this time...again."
 
A good way to learn more,
From earthquakes of yore.

Earthquakes have rocked the planet for eons. Studying the quakes of old could help scientists better understand modern tremors, but tools to do such work are scarce.

Enter zircons. Researchers used the gemstones to home in on the temperatures reached within a fault during earthquakes millions of years ago. The method offers insights into the intensity of long-ago quakes, and could improve understanding of how today’s tremors release energy, the researchers report in the April Geochemistry, Geophysics, Geosystems.

Earthquakes have rocked the planet for eons. Studying the quakes of old could help scientists better understand modern tremors, but tools to do such work are scarce.

Enter zircons. Researchers used the gemstones to home in on the temperatures reached within a fault during earthquakes millions of years ago. The method offers insights into the intensity of long-ago quakes, and could improve understanding of how today’s tremors release energy, the researchers report in the April Geochemistry, Geophysics, Geosystems. ...
.
https://www.sciencenews.org/article/zircon-earthquake-gemstone-history-chemistry
 
How to survive an earthquake by staying in bed.

Would you use an earthquake-proof bed that drops into a metal chamber and seals you inside it?​


Watch this video that demonstrates Chinese inventor Wang Wenxi's design for an 'earthquake bed.' The bed has sensors that detect tremors, which activate the bed to drop (along with the person in the bed) into a metal chamber. After the bed drops into the metal box, a roof closes over the top to secure the person inside. Anita Durairaj, writing for Newsbreak, describes the basic design of most earthquake beds, including Wenxi's, and a more recent one designed by Russian inventor Dahir Semenov:

Basically, the mattress would fall into the box and a lid would close over the box. Survival supplies would be readily available in the box for the person or persons sitting inside. Air vents would provide oxygen. ...
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https://boingboing.net/2022/12/16/w...-a-metal-chamber-and-seals-you-inside-it.html
 
ramonmercado said:
How to survive an earthquake by staying in bed.

Would you use an earthquake-proof bed that drops into a metal chamber and seals you inside it?​


Watch this video that demonstrates Chinese inventor Wang Wenxi's design for an 'earthquake bed.' The bed has sensors that detect tremors, which activate the bed to drop (along with the person in the bed) into a metal chamber. After the bed drops into the metal box, a roof closes over the top to secure the person inside. Anita Durairaj, writing for Newsbreak, describes the basic design of most earthquake beds, including Wenxi's, and a more recent one designed by Russian inventor Dahir Semenov:



https://boingboing.net/2022/12/16/w...-a-metal-chamber-and-seals-you-inside-it.html
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How would the bed be able to distinguish between dangerous tremors and - er - fun tremors?

It wouldn’t do much for China’s birthrate if, every time Mr. Wong was on the vinegar strokes, the bed dropped six feet into a skip. Especially if Mrs. Wong had the jester’s shoes. lt’d put her right off the boil.

maximus otter
 
maximus otter said:
How would the bed be able to distinguish between dangerous tremors and - er - fun tremors?

It wouldn’t do much for China’s birthrate if, every time Mr. Wong was on the vinegar strokes, the bed dropped six feet into a skip. Especially if Mrs. Wong had the jester’s shoes. lt’d put her right off the boil.

maximus otter
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Maybe that's the idea?
 
Overnight (last night) and this morning, 2 big quakes strike Turkey and Syria.

Second earthquake hits Turkey after more than 1,000 killed
A rescue operation is under way across much of southern Turkey and northern Syria following a huge earthquake that has killed more than 1,000 people.
The 7.8 magnitude quake struck near Gaziantep in the early hours of Monday while people were asleep.
A new 7.5-magnitude tremor hit at around 13:30 local time (10:30 GMT), which officials said was "not an aftershock".
https://www.bbc.co.uk/news/live/64533954
 
Trevp666 said:
Overnight (last night) and this morning, 2 big quakes strike Turkey and Syria.

Second earthquake hits Turkey after more than 1,000 killed
A rescue operation is under way across much of southern Turkey and northern Syria following a huge earthquake that has killed more than 1,000 people.
The 7.8 magnitude quake struck near Gaziantep in the early hours of Monday while people were asleep.
A new 7.5-magnitude tremor hit at around 13:30 local time (10:30 GMT), which officials said was "not an aftershock".
https://www.bbc.co.uk/news/live/64533954
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I don't see where they say it wasn't an aftershock. Is it because it was on a different fault?
Other sources have called the second event an aftershock. https://www.nytimes.com/2023/02/05/world/europe/earthquake-aftershock-turkey-syria.html
It's not unusual for a large quake to result in effects on a related fault line due to changes in the overall stress regime.
 
Videos of this are quite frightening. Suddenly all the city lights out, some terrifying lightning and then the tremors.

Is lightning usual with earthquakes or just two natural events coincidentally occurring in parallel?
 
McAvennie said:
Is lightning usual with earthquakes
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There has been some research done into this. Also related to this is 'earthlights'. Basically the premise is that the stress that builds up in the rocks making up the tectonic plates is so great that the pressures involved squeeze the rocks causing them to produce an electromagnetic effect which manifests itself above ground, or something like that (I expect a little digging around will find the relevant stuff).
With the ever increasing ownership of mobile phones with cameras, and CCTV everywhere, these events are being captured on film more frequently.

But, short answer - often 'yes'.
 
Trevp666 said:
There has been some research done into this. Also related to this is 'earthlights'. Basically the premise is that the stress that builds up in the rocks making up the tectonic plates is so great that the pressures involved squeeze the rocks causing them to produce an electromagnetic effect which manifests itself above ground, or something like that (I expect a little digging around will find the relevant stuff).
With the ever increasing ownership of mobile phones with cameras, and CCTV everywhere, these events are being captured on film more frequently.

But, short answer - often 'yes'.
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Nope. That's not correct. The "lightning" is almost always related to electrical transformers exploding or arcing because the power lines break. Anomalous lights that can't be explained by human structures are VERY rare.
https://spookygeology.com/earthquake-lights/

Earthquake lights have not yet entered the sphere of "accepted" by scientists. Though the proposed mechanism have not been adequately demonstrated, they are not far-fetched.
 
McAvennie said:
Videos of this are quite frightening. Suddenly all the city lights out, some terrifying lightning and then the tremors.

Is lightning usual with earthquakes or just two natural events coincidentally occurring in parallel?
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Can you link to some videos? I've only seen the one where there blue flashes are coincident with the power going out - clearly related to transformers exploding/lines severed.
 
Sharon Hill said:
The "lightning" is almost always related to electrical transformers exploding or arcing because the power lines break.
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Yeah.
I meant the lights that are seen in the sky before a quake hits.
I'm just terrible at expressing it sensibly in the first place.
Which is why I included the caveat "or something like that (I expect a little digging around will find the relevant stuff)."
 
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