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Bizarro Earth

Province of Son La, Vietnam rocked by three earthquakes in one night

vietnam earthquake july 2014 map

Muong La District (in the red dashed line) in the northern Vietnamese province of Son La is seen in this Google Map screen capture.
The northern Vietnamese province of Son La experienced three earthquakes in a row on Saturday night, one of which reached a magnitude of 4.3 on the Richter scale, the Earthquake Information and Tsunami Warning Center said.

The three quakes struck Muong La District and their aftershocks were felt in Hanoi, 278 km away from Son La, according to the center under the Institute of Global Physics.

The first quake measuring magnitude 4.3 rocked the district at 7:14 pm, with its epicenter around eight kilometers underground.

The tremor lasted for about 30 seconds, shaking or throwing household furniture and tools to the ground, local residents said.

Many people rushed out of their houses during the earthquake, locals said.

Another quake happened in the same district at 8:20 pm, with a lower strength of magnitude 3.2. Its epicenter was the same as that of the previous one.

More than an hour later, the third earthquake, measuring magnitude 3.5, hit the locality at 9:42 pm, with its epicenter about seven kilometers underground.
Alarm Clock

USGS: Earthquake Magnitude 6.9 - 100km NNE of Ndoi Island, Fiji

Earthquake 6.9 Fiji
© USGS
Event Time
2014-07-21 14:54:40 UTC
2014-07-21 02:54:40 UTC-12:00 at epicenter

Location
19.780°S 178.441°W depth=616.1km (382.8mi)

Nearby Cities
100km (62mi) NNE of Ndoi Island, Fiji
369km (229mi) WNW of Nuku'alofa, Tonga
375km (233mi) ESE of Suva, Fiji
437km (272mi) SSE of Lambasa, Fiji
488km (303mi) ESE of Nadi, Fiji

Scientific data
Alarm Clock

USGS: Earthquake Magnitude 6.0 - 72km WNW of Hihifo, Tonga

Earthquake 6.0 Hihifo Tonga
© USGS
Event Time
2014-07-19 12:27:09 UTC
2014-07-19 00:27:09 UTC-12:00 at epicenter

Location
15.799°S 174.404°W depth=219.8km (136.6mi)

Nearby Cities
72km (45mi) WNW of Hihifo, Tonga
357km (222mi) SW of Apia, Samoa
427km (265mi) WSW of Tafuna, American Samoa
432km (268mi) WSW of Pago Pago, American Samoa
596km (370mi) N of Nuku'alofa, Tonga

Scientific data
Bizarro Earth

USGS: Earthquake Magnitude 6.2 - 98km SE of Kuril'sk, Russia

Kurilsk Quake_210714
© USGS
Event Time
2014-07-20 18:32:47 UTC
2014-07-21 04:32:47 UTC+10:00 at epicenter

Location

44.626°N 148.728°E depth=60.8km (37.8mi)

Nearby Cities
94km (58mi) SE of Kuril'sk, Russia
291km (181mi) ENE of Nemuro, Japan
307km (191mi) ENE of Shibetsu, Japan
361km (224mi) ENE of Abashiri, Japan
1254km (779mi) NE of Tokyo, Japan

Scientific Data
Bizarro Earth

USGS: Earthquake Magnitude 6.0 - Owen Fracture Zone region

Owen Fracture Quake_190714
© USGS
Event Time
2014-07-19 14:14:01 UTC
2014-07-19 18:14:01 UTC+04:00 at epicenter

Location
11.752°N 57.563°E depth=10.0km (6.2mi)

Nearby Cities
396km (246mi) ESE of Tamrida, Yemen
692km (430mi) SSE of Salalah, Oman
708km (440mi) E of Bereeda, Somalia
779km (484mi) ENE of Bandarbeyla, Somalia
1317km (818mi) S of Muscat, Oman

Scientific Data

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U.S.Geologic Survey: Earthquake risk increased for half of U.S.

© AP/USGS
A new federal earthquake map dials up the shaking hazard just a bit for about half of the United States and lowers it for nearly a quarter of the nation.

The U.S. Geologic Survey updated Thursday its national seismic hazard maps for the first time since 2008, taking into account research from the devastating 2011 earthquake and tsunami off the Japanese coast and the surprise 2011 Virginia temblor.

Most of the changes are slight. Project chief Mark Petersen said parts of Washington, Oregon, Utah, Oklahoma, Colorado, Wyoming and Tennessee moved into the top two hazard zones.
Map

New map points up future hot spots for U.S. earthquakes

us earthquake hotspots
© U.S. Geological Survey
Hot spots: California is still a seismic hazard hot spot—but the latest earthquake risk maps suggest a higher risk of damaging quakes than previously estimated.
Earthquake risk assessments can seem pretty abstract at first glance, with their "percent probabilities" and "peak ground accelerations." But the U.S. Geological Survey's (USGS's) national hazard maps, updated periodically, pack a powerful punch: Insurance companies and city planners rely heavily on the maps, which influence billions of dollars in construction every year. Today, USGS scientists released the most recent earthquake hazard assessments for the country. Although the picture hasn't changed much on a national scale since the last report in 2008, the devil is in the details, the report's authors say - and some areas in the country are now considered to be at higher risk for powerful quakes than once thought.

The best-known earthquake zones - California, the Pacific Northwest, and the Intermountain West - still dominate the hazard picture. Farther east, hot spots around the New Madrid Seismic Zone in the center of the country and Charleston, South Carolina, reflect the memory of powerful historical quakes (in 1811 to 1812 and 1886, respectively). But, in fact, all 50 states have the potential for earthquakes, and damaging ground shaking could happen in 42 of the 50 states within 50 years, the new report suggests. Of those, 16 states, all of which have had earthquakes of at least magnitude 6 in historical times, are considered highly likely to experience damaging ground shaking.

To assess the risk of where and how often future earthquakes will occur, and how hard the ground will shake, scientists are constantly seeking new data from these regions and using them to develop new ways of modeling ground motion, says Mark Petersen, a seismologist at USGS in Golden, Colorado, and the lead author of the new report. Among the latest temblors incorporated into the assessment is the 2011 5.8-magnitude Virginia earthquake, which "helped us understand better ground shaking in the central and eastern United States," Petersen says. New data also came from the U.S. Nuclear Regulatory Commission (NRC), which in 2010 published its own risk assessment for earthquake damage to its power plants in the central and eastern United States. These all suggest the region has the potential to experience an even more powerful quake.
Alarm Clock

USGS: Earthquake Magnitude 6.0 - 95km NNW of Yakutat, Alaska

Earthquake in Yakutat Alaska
© USGS
Event Time
2014-07-17 11:49:37 UTC
2014-07-17 04:49:37 UTC-07:00 at epicenter

Location
60.217°N 140.550°W depth=14.8km (9.2mi)

Nearby Cities
95km (59mi) NNW of Yakutat, Alaska
300km (186mi) W of Whitehorse, Canada
411km (255mi) NW of Juneau, Alaska
512km (318mi) E of Knik-Fairview, Alaska
523km (325mi) E of Anchorage, Alaska

Scientific data
Attention

Japan still bracing for violent aftershocks from deadly 2011 earthquake

© Unknown
Seismologists said an earthquake that struck near Japan's shuttered Fukushima nuclear site early Saturday was an aftershock of the tremor that sparked 2011's deadly tsunami, and warned of more to come.

The strong 6.8-magnitude earthquake off the Pacific coast of northeastern Japan caused a minor tsunami in the early hours, though authorities lifted all weather warnings roughly two hours later.

Seismologist Yasuhiro Yoshida of the Japan Meteorological Agency said it was a delayed tectonic reaction to the 9.0-magnitude quake which left the Fukushima nuclear power plant in a meltdown crisis after the coast was ravaged by monster tidal waves in March 2011.

"There are fears that relatively large earthquakes will occasionally occur in the ocean area where aftershocks of the great earthquake continue," he said.

"The aftershock activity has been steadily declining on a long-term basis. But aftershocks, accompanied by tsunamis, will still occur."

The 2011 disaster killed more than 18,000 people.

Saturday's quake measured up to four on the Japanese scale of seven in terms of intensity, and Yoshida said there was a possibility aftershocks measuring a moderate three on that scale would occur in the next two weeks.

Comment: Readers can check out a short video of this earthquake here. Some additional updates on the Fukushima disaster can be found in these related articles:

Alarm Clock

USGS: Earthquake Magnitue 6.4 - 83km SSE of Pondaguitan, Philippines

Earthquake 6.4 Pondaguitan, Philippines
© USGS
Event Time
2014-07-14 07:59:58 UTC
2014-07-14 15:59:58 UTC+08:00 at epicente

Location
5.696°N 126.534°E depth=22.5km (14.0mi)

Nearby Cities
83km (52mi) SSE of Pondaguitan, Philippines
101km (63mi) ESE of Caburan, Philippines
129km (80mi) SE of Malita, Philippines
141km (88mi) ESE of Malapatan, Philippines
897km (557mi) WSW of Koror Town, Palau

Scientific data
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