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Tue, 20 Feb 2018
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Earthquakes

Seismograph

Magnitude 6.3 earthquake jolts northern Chile

Chile earthquake
© USGS
The temblor, which was deep at 110 kilometres, struck at 10:06 p.m. local time on Saturday, epicentred at Tarapaca

The US Geological Survey says a magnitude 6.3 earthquake has struck northern Chile.

The quake, which was deep at 110 kilometres, struck at 10:06 p.m. local time on Saturday. The epicentre in Tarapaca was 76 kilometres east of the city of Putre, and 118 kilometres southeast of the Peruvian city of Tacna.

No tsunami threat

Local media in Chile said there were no immediate reports of damage and that the navy's oceanographic service had discarded the possibility of a tsunami.

An earthquake with a similar strength shook Tarapaca last October.

Alarm Clock

Earthquake swarm hits South Reno, Nevada - More than 230 quakes and counting

South Reno earthquake swarm
South Reno has been shaking, ever so gently, for six days now.

If you live there - near Galena High School or where the Mount Rose Highway goes below the I-580 - you likely haven't felt much, if anything. But earthquake detecting instruments in the area have picked up more than 230 small temblors since late last Thursday.

The largest in the swarm so far, which hit Tuesday afternoon, measured a 2.7 on the Richter scale - a magnitude that University of Nevada, Reno seismologist Ken Smith described as "pretty small."

"You'd have to be right above it to really feel anything," he said, noting they've gotten a few dozen reports from people who've felt the jolts.

While earthquakes in Northern Nevada are commonplace (The Silver State is the third-most seismically active state in the nation), Smith said he and his colleagues at UNR's Nevada Seismological Laboratory pay special attention to earthquake swarms.

Comment: In recent months we have seen other areas of the US experiencing these swarms of mini-earthquakes as well:


Fireball 5

Meteor fireball lights up night sky over Michigan; USGS registers impact as M2.0 earthquake - fragments found (UPDATE, PHOTOS)

Meteor over Michigan
© Mike Austin/YouTube
Residents in several cities across Michigan reported seeing a bright and colorful flash travel through the sky before hearing a loud boom. The US Department of Homeland Security confirmed that it was a meteor fireball.

Numerous videos recorded by security cameras and dashcams in the Metro-Detroit area and surrounding cities Tuesday night show a flash of bright light zooming across the sky, instantly turning night into day for an instant.


Comment: UPDATE: Wed, 17 Jan. 2018 (18.15 CET)

USGS has registered this event as a M2.0 earthquake with the epicenter at New Haven, just north of Detroit in Michigan.
Meteorite seen and heard in Detroit area. Location is approximate. The magnitude reported for this meteor cannot be directly used to compare its size to an earthquake because the source of the seismic signals are different.
The American Meteor Society (AMS) has received almost 400 reports of the event. The flashing light and loud boom felt across Michigan and seen as far away as New York City and parts of Canada on Tuesday night was a meteoroid entering the atmosphere, according to NASA.

A post on the NASA Meteor Watch Facebook page, said the meteoroid traveled northwest from the Brighton area to the Howell area, citing the American Meteor Society's website. The 1 a.m. post read:
"Our analysis yields a similar result, and we have calculated that this was a very slow moving meteor - speed of about 28,000 miles per hour,"

"This fact, combined with the brightness of the meteor (which suggests a fairly big space rock at least a yard across), shows that the object penetrated deep into the atmosphere before it broke apart (which produced the sounds heard by many observers). It is likely that there are meteorites on the ground near this region - one of our colleagues has found a Doppler weather radar signature characteristic of meteoritic material falling to earth."


UPDATE: Sat, 20th Jan. 2018

The Daily Mail reports meteorite hunters have found fragments:
Meteorite hunters who flocked to Detroit from across the U.S. after a meteor exploded are finding the fragments.

Most of the fragments landed in Hamburg Township.

meteor michigan found fragments longway planetarium
The first fragments were located Thursday by professional hunters Larry Atkins and Robert Ward of Arizona, according to the American Meteor Society.
WHAT IS A METEOROID

A meteoroid is a small chunk of asteroid or comet.

When it enters Earth's atmosphere it becomes a meteor, fireball or shooting star.

The pieces of rock that hit the ground are meteorites, and are valuable to collectors.

The remnants must be analyzed by a lab to be accredited as meteorites.
Atkins owns Cosmic Connection Meteorites, while Ward operates Robert Ward Meteorites.

'It's a really spectacular specimen,' Ward said while holding one of the meteorites.

'Two days ago, this was hundreds of thousands of miles past the moon, and now I'm standing here holding it in my hand.

'It's been a real good day.'
meteor meteroid michigan fragments found
Ward said he used seismic data, Doppler radar and witness information to narrow down where to search.

Meteorite hunters seek permission from landowners before searching on their property, Ward said.

Ward estimates he's collected about 600 meteorites from around the world over the years.

Longway Planetarium astronomers have also located three meteorites that'll be displayed Friday.
michigan meteor meteoroid fragment found

Darryl Pitt, a New York City resident and meteorite consultant to Christie's auction house, is offering $20,000 for a recovered fragment weighing at least 1 kilogram.

'I want to motivate more people to look,' Pitt said.

'Meteorites are extraordinarily rare and the world is just coming to terms with how special they are.'



Bizarro Earth

Magnitude 6.3 earthquake strikes Mexico

Loreto Earthquake
© USGS
This map from the U.S. Geological Survey indicates the location of an earthquake that struck around 45 miles north-northeast of Loreto, Mexico, on Friday, Jan. 19, 2018.
Gulf of California-- A preliminary-magnitude 6.3 earthquake struck Friday morning in the Gulf of California, just west of Mexico's Sinaloa state.

The quake struck at 8:17 a.m. PT and was centered about 48 miles north-northeast of Loreto, according to the U.S. Geological Survey.

There were no immediate reports of injuries or damage.

Seismograph

Earthquake in Öræfajökull volcano in Iceland

The last eruption in Öræfajökull occured in 1727.
© mbl.is/RAX
The last eruption in Öræfajökull occured in 1727.
An earthquake measuring 3.2 occurred at 02:14 AM in the North Eastern part of Öræfajökull volcano. There are no signs of an eruption according to the Iceland Met Office.

Last week, 220 earthquakes were detected using the SIL seismis system at the Iceland Met Office. The week before, 500 earthquakes were detected.

Seismograph

Shallow 5.8 magnitude off Raoul Island, New Zealand

Seismogram as recorded in the scientific station at Raoul Island

Seismogram as recorded in the scientific station at Raoul Island
Most important Earthquake Data:

Magnitude : 5.8

Local Time (conversion only below land) : Unknown

GMT/UTC Time : 2018-01-17 22:56:58

Depth (Hypocenter) : 30.82 km

Seismograph

Buildings shake as 5.7 magnitude earthquake rocks Taiwan

earthquake taipei 2018
© Central Weather Bureau
A 5.7 magnitude earthquake has rocked Taipei, the capital city of Taiwan, according to the Central Meteorological Bureau. Local witnesses reported a slight rocking of buildings in the city.

The quake's epicenter was nearly 12km north of Taipei City Hall, at a depth of 140km.

Seismograph

Magnitude 5.9 earthquake hits off the coast of Nicaragua

map quake
The European-Mediterranean Seismological Center has reported an earthquake of magnitude 5.9 occurring on Tuesday off the coast of Nicaragua and Costa Rica.

The earthquake occurred in Pacific Ocean, 79 kilometers southwest of the city of San Juan del Sur. According to seismological center, the epicenter of the tremors was 142 km south of the Nicaraguan capital of Managua. The hearth of the quake lay at a depth of 59 km.

At first the USGS put the magnitude of the earthquake at 6.0 but later it revised it.

There is no information on injuries or damage at this point, and no tsunami threat was announced. According to reports some electrical poles in Managua have fallen.

Seismograph

Shallow 4.3 magnitude earthquake rattles Greece, tremors felt in Athens

Greece earthquake
© earthquaketrack.com
A 4.3 magnitude quake that shook Greece on Monday night was felt in Athens. Witnesses reported a strong tremor in the capital city.

The U.S. Geological Survey said the quake struck 25 kilometers (15 miles) northeast of Athens at a depth of 10 kilometers, just before 8.30pm local time.

According to the EMSC - an independent provider of real-time earthquake warnings - the tremor was felt over an area inhabited by 3.6 million people

Witnesses close to the epicenter near Marathon, in southeast Attica, told the agency it felt like a bomb exploded nearby. "It sounded like someone dropped a bomb and then everything started shaking," one person who was three kilometers from the epicenter reported.

Reports from central Athens and the suburbs described the quake as strong but quick.

Seismograph

Shallow 7.1 magnitude earthquake strikes southern Peru, leaves 1 dead and 20 injured

The earthquake struck off the Peruvian coast just after 4 a.m. local time Sunday.

The earthquake struck off the Peruvian coast just after 4 a.m. local time Sunday.
A strong earthquake struck the coast of southern Peru on Sunday morning, the U.S. Geological Survey said, causing damage to some homes, collapsing roads and injuring around 20 people.

A strong earthquake struck the coast of southern Peru on Sunday morning, the U.S. Geological Survey (USGS) said, leaving one dead and around 20 injured and causing homes and roads to collapse.

The 7.1 magnitude quake hit at 4:18 a.m. local time (0918 GMT) at a depth of around 10 km (6 miles), the USGS said. Peru's government Geophysical Institute said the earthquake was of magnitude 6.7 with its epicenter in Lomas, in the southern region of Arequipa.