Aardbevingen #13

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NewEarthquake Earthquakes Tsunamis

Preliminary: 6.6 earthquake, Near East Coast of Honshu, Japan. On 2011/09/16 19:26:44 UTC (9m ago, depth 41km). http://j.mp/o4Fo9Z
10 minutes ago

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Op vrijdag 16 september 2011 21:47 schreef Turbomuis het volgende:
6.6 net bij Japan.Gaat steeds beter daar... NOT

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http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/pt11259000.php

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Op vrijdag 16 september 2011 23:48 schreef Light het volgende:

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En nog een 6.2
http://earthquake.usgs.go(...)uakes/usc0005vyj.php

Da's de derde 6.0+ in die regio binnen twee dagen
6.2 36.289N 141.308E - 15 Sep 2011 08:00:07 UTC
6.6 40.288N 142.727E - 16 Sep 2011 19:26:42 UTC
6.2 40.221N 143.049E - 16 Sep 2011 21:08:05 UTC

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Op zaterdag 17 september 2011 00:11 schreef Frankz0rz het volgende:

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En nu ook weer een 5,6.... gaat goed daar.

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BREAKING NEWS:

Three people killed as British embassy compound wall collapses after earthquake in Nepali capital Kathmandu

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Deaths after quake in Nepal/India
A magnitude 6.8 earthquake shook India's Sikkim state on Sunday night, sending people running from their homes. The epicenter of the quake was about 40 miles from Gangtok, the state's capital, on the Nepalese border.

The Indian government has reported that eight people died in India and Nepal, at least three when a building in Kathmandu collapsed. The quake also created a number of mudslides on the outskirts of Gangtok, killing at least one man who was trapped inside his car.

Additionally, at least 100 people were injured, according to initial reports. The earthquake also temporarily disrupted telephone lines, and the rapid rate of cell phone use over-burdened mobile networks, according to The Hindustan Times.

The tremors were felt as far away as Delhi, about 900 miles to the west.

India sits on the Indian Plate, a tectonic plate that has been colliding with the Eurasia Plate for about 50 million years. The Indian Plate is slowly being wedged under Eurasia, pushing up the northern plate, causing it to lift. The tectonic movement created the Himalayan Mountain range, which straddles the collision point between India, Nepal, Tibet and China.

Because of the plates' movement, the Himalayas are growing taller every year.

Earthquakes in India aren't rare, but a 6.8 magnitude quake is significant. The most recent quake in the country occurred on Sept. 7, when a 4.2 magnitude quake hit Delhi, where just hours earlier a bomb blast killed 11 and injured dozens more outside the Delhi High Court.

Delhi is considered to be in Zone 4 of the Earthquake Hazard Map of India, and is therefore designated as being in the High Damage Risk Zone. There hasn't been a significant earthquake in the city's recent history, although it has experienced minor vibrations from quakes elsewhere in the country and in Pakistan.

Gangtok is also in Zone 4, and is nestled between two Zone 5 (highest risk) areas to the east and west.

On Sunday, there were also earthquakes reported in Virginia and New Zealand, although they were significantly less potent than the Sikkim quake.

A series of tremors in Virginia, ranging from magnitudes 1.9 to 2.1 on the Richter scale, are now considered to be aftershocks of the Aug. 23 earthquake that shook the East Coast of the United States, according to the U.S. Geological Survey. Meanwhile, a 4.1 magnitude quake hit North Queensland, New Zealand around 2:30 a.m. Sunday.

There have not been any reports of injuries or damages in either location.

Last Thursday, two significant earthquakes happened in Cuba and Japan, ranging from a 6.0 to a 6.2-magnitude respectively.

Are multiple earthquakes in the same day anything to worry about?

Considering that there are about 1.5 million earthquakes a year, not really. And that's just above magnitude 2.0. Below that, there are more millions.

Additionally, USGS claims that 134 earthquakes between the magnitudes 6 and 6.9 occur annually, the same magnitude as those that hit India, Cuba and Japan. Statistically, is it not unlikely that two would happened on the same day.

In the past week, there have been more than 250 earthquakes in Alaska alone, nearly 30 of which happened Sunday. In California and Nevada, there were nearly 400 quakes over the same period, the largest reaching around 4.0 magnitudes, according to USGS.

Yet, 2011 has seen its share of large-scale quakes. In March, a 9.0 earthquake hit Japan, causing enormous damage and a nuclear disaster at the Fukushima power plant. A month earthlier, a 6.3 magnitude earthquake in Christchurch, New Zealand killed nearly 200.

On Sept. 6, a 6.6 magnitude earthquake hit the Indonesian island of Sumatra, killing a 12-year-old boy who was lying in bed and a man who died of a heart attack as he fled his home.

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De beving werd gevolgd door minstens twee naschokken van 6,1 en 5,3

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Op zondag 18 september 2011 23:11 schreef Frankz0rz het volgende:
Op de FP staat:

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Maar daar zie ik helemaal niks van op usgs staan Alleen een 4,6 en 4,8 in diezelfde regio.

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Op maandag 19 september 2011 10:25 schreef Scrummie het volgende:
Vanochtend al een 5.2 en een 5.4 bij Fox Islands, Aleutian Islands, Alaska, nu weer een 5.8.

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Ground beneath Kanchenjunga slips south, alarm bells ring for Bengal

New Delhi, Sept. 18: A behemoth chunk of rock about 20km beneath the mountains around Kanchenjunga lurched southward today in the 6.9 magnitude earthquake that scientists say should stir the Bengal and Sikkim governments into a state of high alert.

The first and preliminary analysis of the mechanisms underlying the earthquake near the Sikkim-Nepal border suggests that the western edge of Sikkim had slipped southward relative to Nepal during the earthquake, geophysicists and seismologists said.

The first earthquake was followed by two smaller 4.8 and 4.6 magnitude earthquakes on the eastern side of the main event in a pattern that points to additional build-up of strain in subterranean rocks across Sikkim, three scientists tracking the events said.

“The movement of rock associated with the 6.9 event on the western side of Sikkim is likely to have caused a pile-up of strain towards its east leading to the two subsequent events," said Supriyo Mitra, a seismologist at the Indian Institute of Science Education and Research, Calcutta. “In a region where strain has accumulated for years, the 6.9 event was a trigger for the next two,” Mitra told The Telegraph.

Geophysicists say the two smaller earthquakes would not have released the enormous strain that has accumulated in the region. “The two (smaller) quakes were like peanuts,” said Vinod Gaur, a geophysicist at the Indian Institute of Astrophysics, Bangalore.

G.C Debnath, director of the Alipore meteorological centre, said: “The first tremor with an intensity of 6.9 on the Richter scale happened at 6.11pm, followed by a 5.7 intensity aftershock at 6.21pm. The third one happened at 6.43pm with 5.3 intensity, while the last one occurred at 7.24pm with intensity of 4.6 at Richter scale.”

“These are not aftershocks because they are not on the same fault as the first event,” said Mitra, the seismologist at the Indian Institute of Science Education and Research, who maintains four seismic monitoring stations in Sikkim.

Scientists say release of the accumulated strain in Sikkim could happen in months or years — and earthquakes cannot be predicted. “I think prudence dictates that Bengal and Sikkim should initiate action — at least across Sikkim and north Bengal — to scrutinise buildings such as schools and hospitals, where a large number of people assemble, for vulnerability and retrofitting using available engineering solutions,” said Gaur.

The Himalayan region marks the zone where India is slipping under Tibet at the rate of about 18mm per year. This tectonic plate movement leads to strain build-up, which is released when subterranean rocks along the slip zone reach their fracture points.

Scientists estimate that the amount of energy released during the 6.9 earthquake was equivalent to 340,000 tonnes of TNT, or about 22 times the energy released by the atomic bomb dropped on Hiroshima.

Geophysicists say earthquakes in the Himalayas are likely to cause significant shaking of structures built along the Gangetic plains across northern and eastern India. “The contrast between the soft sediments lying above the harder rock all along the Gangetic plains is likely to cause amplification of energy,” said Shyam Sunder Rai, a scientist at the National Geophysical Research Institute, Hyderabad.

“Whatever energy has been released by the earthquakes today does not rule out the possibility of an even bigger quake in other areas along the Himalayan region,” said Rai.

Gaur believes moderate earthquakes may mean that more are to come. “Moderate earthquakes in plate boundary environments such as the Himalayas therefore verily presage closeness of the region to a great rupture of magnitude 8 or so.”

The US Geological Survey said this region has experienced relatively moderate seismicity in the past with 18 earthquakes of magnitude 5 or larger over the past 35 years within 100km of the epicentre of today’s event. The largest of these was a magnitude 6.1 earthquake in November 1980 about 75km southeast.

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Mega quakes occur more frequently when sun has fewer sunspots: researchers

The frequency of mega earthquakes increases during periods when the sun has fewer sunspots, a team of Japanese researchers has found.

The finding was made by a team led by Kiyofumi Yumoto, a researcher in space and earth electromagnetism at Kyushu University's Space Environment Research Center.

The March 11 Great East Japan Earthquake occurred when there were few sunspots. The latest research suggests that the sun's activity could influence movements beneath the earth's surface.

Sunspots gradually increase and decrease in number in a cycle of about 11 years, and cause changes in the earth's atmosphere. The research team investigated the possibility that they could also produce changes beneath the earth's surface, and compared data on the number of sunspots between 1963 and 2000 and the 327,625 earthquakes of magnitude 4 or more that occurred during this period.

The study found that 65 percent of the earthquakes with magnitudes between 4.0 and 4.9 occurred during the periods with the fewest sunspots (each lasting about two years). The figure was around the same for earthquakes with magnitudes between 5.0 and 7.9. However, the figure was higher for the 28 mega earthquakes with magnitudes in the 8.0-9.9 range, with 79 percent of them occurring during periods with the fewest sunspots.

When there are fewer sunspots, a phenomenon occurs in which solar winds, or streams of charged particles from the sun, get stronger an average of three to four times a month. Seventy percent of the earthquakes of magnitude 6.0 or stronger occurred at such times.

Solar winds that become stormy are known to be able to induce strong currents in power transmission lines, which can lead to major blackouts.

"The relationship between the sun and the activity of earthquakes is not clear, but we hope that this is a step in uncovering the mystery of quakes," Yumoto said.

The results of the group's research will be announced at a meeting of the Society of Geomagnitism and Earth, Planetary and Space Sciences, which opens in Kobe on Nov. 3.

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Op dinsdag 27 september 2011 14:05 schreef aloa het volgende:
Schokkende beelden paniek bij toeristen tijdens aardbeving in Washington Monument

Gezinnen met kinderen stormen van trap; gebouw trilt 2’; barsten in muur, puin valt naar beneden

<knip>

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FLASH: Magnitude 5.6 earthquake jolts Fukushima prefrecture in northeastern Japan - TV

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FLASH: No report of abnormalities at Fukushima nuclear plant after northeast Japan earthquake - NHK

twitter:

Quakeprediction twitterde op donderdag 29-09-2011 om 14:30:54 Earthquake warning for the Los Angeles basin & Salton Sea. 8.0 earthquake likely to hit near the Salton Sea; http://t.co/wmi2x9oP reageer retweet

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Op donderdag 29 september 2011 14:41 schreef Frutsel het volgende:

twitter:

Quakeprediction twitterde op donderdag 29-09-2011 om 14:30:54 Earthquake warning for the Los Angeles basin & Salton Sea. 8.0 earthquake likely to hit near the Salton Sea; http://t.co/wmi2x9oP reageer retweet

Ruim een week terug was het 7.0..... toen 7.7... nu 8.0

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FLASH: 6-magnitude earthquake in northern Argentina - USGS

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GFZ Potsdam - Earthquake Bulletin
F-E Region: Salta Province, Argentina
Time: 2011-10-06 11:12:29.8 UTC
Magnitude: 6.3

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2011-10-10 06:03:29.52hr 13min ago 37.15 N 22.02 E 10 2.3 SOUTHERN GREECE
2011-10-10 05:06:28.73hr 10min ago 37.13 N 22.01 E 10 2.0 SOUTHERN GREECE
2011-10-10 04:49:46.03hr 26min ago 37.31 N 22.10 E 2 4.1 SOUTHERN GREECE
2011-10-10 03:29:56.64hr 46min ago 39.70 N 23.85 E 5 2.3 AEGEAN SEA
2011-10-10 03:22:26.94hr 54min ago 39.53 N 23.69 E 10 2.5 AEGEAN SEA
2011-10-10 02:57:44.05hr 18min ago 38.31 N 20.45 E 2 2.9 GREECE
2011-10-10 01:20:57.06hr 56min ago 37.22 N 22.04 E 1 4.2 SOUTHERN GREECE
2011-10-10 01:19:00.56hr 58min ago 37.17 N 21.99 E 10 2.2 SOUTHERN GREECE

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Tientallen gewonden op Bali na aardbeving

Een sterke aardbeving ten zuiden van het eiland Bali op donderdag in de morgen heeft voor schade en gewonden gezorgd op het toeristische eiland Bali in Indonesië. Het is niet bekend of er ook doden zijn gevallen.

De aardbeving met een magnitude van 6,8 vond plaats om 11:16 lokale tijd en lag op zo'n 143 kilometer ten zuidwesten van Nusa Dua. De beving vond plaats op een diepte van 10 kilometer, waarmee het een oppervlakkige beving was, aldus het Klimatologisch, Meteorologisch en Geofysisch Agentschap BMKG.

De Amerikaanse tegenhanger van de BMKG, het USGS, heeft de beving vastgesteld op een magnitude 6.0, en stelt dat bijna 4,6 miljoen mensen de beving gevoeld hebben. Ooggetuigen meldden dat in diverse delen van het eiland mensen in paniek hun hotels en huizen ontvluchtten.

Er is bovendien schade ontstaan aan diverse gebouwen. Enkele hiervan zouden ook ingestort zijn. Volgens de politie zouden er 46 mensen gewond geraakt zijn. Er is voor deze beving geen tsunami-alarm uitgegeven, omdat de beving hiervoor niet sterk genoeg zou zijn.

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Strong earthquake offshore Oregon
A strong earthquake struck off the coast of Oregon on early Wednesday evening, seismologists said, but there were no reports of damage or casualties and no tsunami warning was issued.

The 5.3-magnitude earthquake at 8.13 p.m. local time (0413 GMT Thursday) was centered about 144 miles (233 kilometers) west of Coos Bay, a city located in Coos County on the Pacific coast. It struck about 6.2 miles (10 kilometers) deep, making it a shallow earthquake, according to the United States Geological Survey (USGS).

The USGS said it did not expect to see damage or casualties due to the earthquake’s distance from the coast, and there were no immediate reports of tremors being felt anywhere along the coast.

Wednesday’s earthquake was one of the strongest earthquakes to hit off the coast of Oregon in recent years, but no tsunami warning was issued by the West Coast and Alaska Tsunami Warning Center (WCATWC).

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Toeristen Bali wachten op nieuwe aardbeving

NUSA DUA - Nederlandse toeristen op Bali kunnen binnen enkele uren nog een zware aardbeving verwachten. Indonesische media waarschuwen de inwoners van Bali zich voor te bereiden op een nieuwe beving.

De eerste beving heeft nog geen levens geëist maar vele gebouwen zijn ernstig beschadigd en niet meer toegangbaar. Ook zijn er in het zuiden van Bali, bij Nusa Dua, grote scheuren waar te nemen in de weg. "Scheuren zo groot dat je je voet erin kwijt kan," vertelt een verontruste Nederlander op Bali.

"Vooral de toeristen die niet bekend zijn met aardbevingen waren erg in paniek. Zelfs de inwoners van Bali, die veel te maken hebben met aardbevingen, schrokken van de grootte van deze beving." De eerste beving had een kracht van 6,2 op de schaal van Richter.

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Rare moderate earthquakes rattles Southern Texas
A shallow, moderate earthquake struck southern Texas (TX) on Thursday morning, according to the United States Geological Survey (USGS). It was one of the strongest earthquakes to hit the region in at least two decades.

The 4.6 magnitude quake hit at 07:25 AM local time (13:25 PM GMT) and was recorded at a depth of 5 km (3.1 miles). The EMSC estimated that the quake measured 5.0mb on the Richter Scale.

The epicentre of the quake was located 22 km (14 miles) NW (321°) from Pawnee, TX; 23 km (14 miles) SSW (213°) from Falls City, TX; 26 km (16 miles) WSW (249°) from Karnes City, TX; 60 km (37 miles) NW of Beeville, TX; 76 km (47 miles) SSE (154°) from San Antonio, TX; 166 km (103 miles) SSW of AUSTIN, TX; 92 km (57 miles) E of Pearsall, TX; and 463 km (288 miles) SSW (197°) from Dallas, TX.

The most recent earthquake to strike the region hit on 25 April, 2010. The 4.0 magnitude earthquake was recorded 56 km west of Corpus Christi.

Texas has no active or dormant volcanoes and few earthquakes, being situated far from an active plate tectonic boundary. The Big Bend area, located about 550 kilometres west of San Antonio, is the most seismically active; however, the area is sparsely populated and suffers minimal damages and injuries, and no known fatalities have been attributed to a Texas earthquake.