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Sun, 18 Nov 2018
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Earthquakes

Seismograph

Shallow 6.4 magnitude earthquake shakes Guam

quake
Guam was shaken by a 6.4 magnitude earthquake at 3:52 p.m. on Sunday, the U.S. Geological Survey states.

The 6.4 magnitude earthquake struck about 123 miles southeast of Inarajan at a depth of about 6.21 miles, the agency states.

There is no tsunami threat to Guam or the Marianas from the earthquake as of 4:47 p.m., according to Guam Homeland Security/Office of Civil Defense spokeswoman Jenna Blas.

There were no reports made to Guam 911 dispatch of damages or injuries from the earthquake, Blas said.

The agencies remind residents that when an earthquake strikes, conduct the earthquake procedure: "Drop, cover and hold on" until the shaking stops.

Seismograph

'Deep creep' discovery near California's deadliest faults could explain mystery earthquakes

earthquake graph
© Phil McCarten / Reuters
The discovery of unusual behavior deep beneath the surface near California's deadliest faults has shed new light on seismic activity in the area and could explain nearby enigmatic earthquakes.

New research published in Geophysical Research Letters suggests that the strange deformation of some very small earthquakes in California's San Bernardino basin near the San Andreas and San Jacinto faults may be due to a "deep creep" 10km below the Earth's surface.

Geoscientists at the University of Massachusetts Amherst analyzed thousands of small earthquakes, noting that many exhibited surprising deformation patterns such as showing vertical movement far below the surface.

The usual type of fault in the region is called a strike-slip fault, where the motion is one of blocks sliding past each other. However, in this small area scientists observed an extending fault, where the motion between blocks is like a wave pulling away from the beach.

Seismograph

Rare earthquake hits West Jutland, Denmark

Mors, Denmark
© Finn Byrum/Ritzau Scanpix
File photo: Mors from the air.
An earthquake measuring 3.4 on the Richter scale was felt in parts of West Jutland on Sunday.

The quake was registered at 10:57am local time. Its epicentre was just outside the town of Hobro, the Geological Survey of Denmark and Greenland (GEUS) confirmed.


Comment: There seems to be an error in the reporting. While it is true there is a town called Hobro, there is also one called Holstebro located 70 km to the south-west of Hobro. According to the geologists, the small earth quake occured near Holstebro.


"On a global scale, this is a small earthquake, and many of this magnitude occur every day. But for Denmark, this is one of the larger earthquakes. We don't often see earthquakes of this size here," GEUS seismologist and senior researcher Trine Dahl-Jensen said.

An earthquake measuring 3.4 Richter magnitude can cause "noticeable" shaking of indoor objects but very rarely causes damage, according to the scale.

Sunday's tremor is the strongest in Denmark since 2012, when an earthquake reaching 4.3 Richter magnitude was recorded.

GEUS confirmed a quake had occurred after people living in the area reported noticing the tremor on Sunday.

"We noticed briefly that the whole building where we are located was shaking. It's actually a solid building," Central and West Jutland Police duty officer Carsten Henriksen told Ritzau.

Seismograph

Rare earthquake, magnitude-5.6, rocks southwestern Australia

earthquake australia 2018
© Le resau sismologique de Noevelle-Caledonie
The earthquake struck about 1:00pm local time.
A magnitude-5.6 earthquake has hit near the West Australian town of Walpole, about 430 kilometres south-east of Perth, with tremors felt as far away as Perth and Albany.

The earthquake happened about 1:00pm (WST).

Walls were cracked at two homesteads in the Lake Muir region, but there were no other initial reports of damage.

The Bureau of Meteorology WA said there was no tsunami risk to Australia. It said the quake was centred near Lake Muir and forecasters working in its West Perth headquarters felt the building sway.

Senior Geoscience Australia seismologist Phil Cummins said it was the second earthquake to hit the region in a week.

"It occurred roughly between Walpole and Kojonup on the south coast, it was felt all the way from Albany up to Perth," he said.

"It is quite a large earthquake, it is large enough to cause damage but it's unlikely to have done so because it occurred in a relatively remote area."

Seismograph

2.6 magnitude earthquake rattles area north of Augusta

earthquake augusta
© WGXA
The epicenter of the earthquake was just outside of the small town of McCormick, SC.
A 2.6 magnitude earthquake has been reported Thursday morning about a mile ESE of McCormick, South Carolina. That town is about 30 miles north of Augusta.

Earthquakes in the eastern part of the country happen rarely. When they do happen they are felt over a much later area than quakes that occur west of the Rockies.

This is a minor earthquake and as of Thursday morning, no injuries or damage has been reported.

Seismograph

Iceland's second deadliest volcano stirs: A sharp earthquake swarm detected in Öræfajökull

The southernmost part of Vatnajökull glacier.
© Loftmyndir.is
The southernmost part of Vatnajökull glacier.
Several relatively strong earthquakes have been detected in one of the most powerful volcanoes in Iceland since yesterday. A total of 15 quakes have been recorded in the volcano in the past 48 hours, including two significant 2+ quakes: A 2.7 magnitude quake yesterday, Tuesday evening, at 20:13 and a second 2.6 magnitude quake today Wednesday at 12:45.

Volcano kept under close surveillance

According to the Seismic Monitoring System of the IMO the epicenter of yesterday's 2.7 magnitude quake was in the Southeastern part of the volcano's caldera at a depth of only 100 m (330 ft), while today's 2.6 magnitude tremor had an epicenter in the norther edge of the caldera at a depth of 2.2 km (7,200 ft) below the surface. Historically earthquakes have been extremely rare in Öræfajökull. Recently the volcano has been showing significantly greater levels of activity.

Snowflake

Parts of British Columbia are already seeing snow

snowfalke
We might be reluctantly breaking out our rainboots and long pants here in the Lower Mainland, but elsewhere in B.C. they're already seeing snow.

On Tuesday, the coldest spot in the province according to Environment Canada is the Fort Nelson Airport, where temps today in the northeast corner of B.C. are in the 0C to -1C range, with light snow. Muncho Lake and Sikanni Chief also have light snow in Tuesday's weather forecast.

Seismograph

Shallow M6.1 earthquake strikes southeast of Loyalty Islands

Loyalty Islands quake
© USGS, EMSC
A 6.1 earthquake struck off the coast of Loyalty Islands approximately 146 miles from New Caledonia.

The quake struck at 19:31:38 UTC on September 10, 2018.

There has been no reports of damages or injuries, and no tsunami warning has been issued.

Location: 22.061S 170.085E

Depth: 10 km

Distances:

- 234.6 km (145.5 mi) ESE of Tadine, New Caledonia
- 291.2 km (180.5 mi) SSE of Isangel, Vanuatu
- 318.6 km (197.5 mi) ESE of W, New Caledonia
- 363.7 km (225.5 mi) E of Mont-Dore, New Caledonia
- 375.3 km (232.7 mi) E of Dumba, New Caledonia

Location Uncertainty: Horizontal: 8.7 km; Vertical 1.9 km

Seismograph

Magnitude 6.5 earthquake hits Solomon Islands

solomon islands quake
© USGS
The quake, which occurred at 7.31 (NZT), was located between the islands of Malita and Makira at a depth of 65 kilometres.
A magnitude 6.5 earthquake has hit the Solomon Islands, the US Geological Survey reports.

The quake, which occurred at 7.31 (NZT), was located between the islands of Malita and Makira at a depth of 65 kilometres.

There was no tsunami risk, the Pacific Tsunami Warning Centre said.

Seismograph

Cluster of small earthquakes shake New Zealand as M6.8 quake rocks Kermadec Islands

NZ quake
© NZ Herald graphic
An earthquake expert says a cluster of small quakes which has rocked parts of the country is unlikely to be related to a major shake near the Kermadec Islands.

A Geonet spokesman said there is no definite way to tell but Kiwis should not think the shaking throughout the country is related to the Kermadec quake.

The spokesman also told the Herald there should be little concern the Kermadec quake would trigger a big quake in New Zealand.

"You can't make any guarantees but there's no reason to think this would trigger something on the Alpine Fault or any other major fault in New Zealand," the spokesman said.

A magnitude 6.8 earthquake struck south of the Kermadec Islands at 4.19pm and the Ministry of Civil Defence warned it could trigger a tsunami.

However, the Ministry was quick to quash any possibility of a tsunami impacting New Zealand as a result of the earthquake.