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Earthquakes

Bizarro Earth

Turrialba Volcano in Costa Rica shaken by violent eruption, ash reaches province of Limón


Tico Times
Tue, 04 Nov 2014 16:08 UTC
Image
© The Tico Times
A site near the Turrialba Volcano’s crater.

Among the observations by volcanologists conducting weekend inspections in the area around Costa Rica's Turrialba Volcano were craters in the earth measuring up to one meter in diameter - the result of rocks shooting out from the volcano.

Experts from the National Seismological Network (RSN) and the Volcanological and Seismological Observatory of Costa Rica (OVSICORI) conducted the inspections in light of significant activity at the volcano that started last week.

RSN volcanologist Gino González Ilama said the areas of impact are located on the south side of the volcano and cover 80 percent of the slope up to 400 meters from the volcano's crater.

"We observed the impact of volcanic rock that had caused several craters on the ground. We believe the rocks were shot out of the volcano at speeds greater than 100 kilometers per hour, and this proves there is strong activity inside," González said.
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Bizarro Earth

USGS: Earthquake Magnitude 7.1 - 141km NE of Ndoi Island, Fiji


US Geological Survey
Sat, 01 Nov 2014 22:48 UTC
Ndoi Island Quake_011114
© USGS
Event Time
2014-11-01 18:57:22 UTC
2014-11-01 06:57:22 UTC-12:00 at epicenter

Location
19.698°S 177.794°W depth=434.4km (269.9mi)

Nearby Cities
141km (88mi) NE of Ndoi Island, Fiji
313km (194mi) WNW of Nuku'alofa, Tonga
432km (268mi) ESE of Suva, Fiji
470km (292mi) SE of Lambasa, Fiji
546km (339mi) ESE of Nadi, Fiji

Scientific Data

Comment:


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Bizarro Earth

6.0-magnitude earthquake jolts southeastern Pacific


Raw Story
Sat, 01 Nov 2014 00:00 UTC
easter island earthquake
© AFP
A technician of the French National Seism Survey Institute (RENASS) presents a graph of an earthquake
A strong earthquake jolted the southeastern Pacific on Saturday, about 544 kilometers (338 miles) south-southeast of Chile's Easter Island, the US Geological Survey said.

The 6.0-magnitude quake, which hit at 3:59 am local time (10:59 GMT), registered at a depth of 10 kilometers (6.2 miles).

It did not immediately spark a tsunami warning, according to the Hawaii-based Pacific Tsunami Warning Center.

Comment: An increase in earthquakes on the Big Blue Marble:



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Alarm Clock

USGS: Earthquake Magnitude 6.1 - 129km NW of Hihifo, Tonga


U.S.Geological Survey
Tue, 28 Oct 2014 13:13 UTC
Earthquake 6.1 Hihifo, Tonga
© USGS
Event Time
2014-10-28 03:15:43 UTC
2014-10-27 15:15:43 UTC-12:00 at epicenter

Location
15.193°S 174.666°W depth=35.0km (21.7mi)

Nearby Cities
129km (80mi) NW of Hihifo, Tonga
346km (215mi) WSW of Apia, Samoa
435km (270mi) WSW of Tafuna, American Samoa
438km (272mi) WSW of Pago Pago, American Samoa
651km (405mi) E of Lambasa, Fiji

Scientific data
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Bizarro Earth

Colombia-Ecuador border earthquake sparking concern of possible imminent volcanic eruption

Emil Foget
ColombiaReports.co
Thu, 23 Oct 2014 21:57 UTC
Image
Authorities in southwestern Colombia have raised alert levels on Tuesday after a 5.6M earthquake hit the border region, raising concerns that two nearby volcanoes might erupt in a matter of days. Colombia's Geological Service have changed the alert level of two volcanoes from yellow to orange. The two volcanoes are Cerro Negro and Chiles, both active on Colombia's southern border with Ecuador.

The orange alert level is defined by the Geological Service as "probable eruption in term of days to weeks." The earthquake that hit the border region caused a scare on both side of the border.

Officials in the Colombian town of Cumbal, near the quake's epicenter, were quoted as saying by The Associated Press that they formed an emergency committee to survey possible damage. But so far, there were no reports of injuries in the town of 36,000 residents, the majority of them members of an indigenous tribe.

"It was really strong, every house" felt it, Jose Diomedes Juezpesan, the town's top official, told AP. If the volcanoes are to erupt, it will mostly affect the state Nariño. Local state government have started to take security measures in order prevent tragedies.
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Bizarro Earth

Around 70 earth­quakes in the last 24 hours at Iceland's Bárðar­bunga caldera rim


MBL.is
Thu, 23 Oct 2014 22:11 UTC
Image
© Guðmundur K. Sig­ur­dórs­son
Ac­cord­ing to the Ice­land Met Of­fice, no sig­nif­i­cant changes are ob­served in the seis­mic ac­tiv­ity around the Bárðar­bunga vol­canic sys­tem.
Ap­prox­i­mately 70 earth­quakes oc­curred on the Bárðar­bunga caldera rim in the last 24 hours re­ports the Ice­land Met Of­fice this morn­ing. The strongest quakes were of the mag­ni­tude of 4.8 yes­ter­day at 13:21 and at 4.6 at 01:36. Seven earth­quakes al­to­gether ex­ceeded the mag­ni­tude of 4, and 15 earth­quakes were in the mag­ni­tude range of 3-3.9. Sub­si­dence of the caldera is con­tin­u­ous.

Ac­cord­ing to the Ice­land Met Of­fice, no sig­nif­i­cant changes are ob­served in the seis­mic ac­tiv­ity around the Bárðar­bunga vol­canic sys­tem.

Around 30 events have been de­tected in the north­ern part of the dyke in­tru­sion, be­tween north­ern Dyn­gju­jökull and the erup­tion site in Holuhraun. The strongest ones were both of the mag­ni­tude 1.4 yes­ter­day at 10:07 and 13:33.
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Bizarro Earth

USGS: Earthquake Magnitude 6.0 - 9km S of San Gabriel, Ecuador


US Geological Survey
Mon, 20 Oct 2014 22:21 UTC
San Gabriel Quake_201014
© USGS
Event Time
2014-10-20 19:33:21 UTC
2014-10-20 14:33:21 UTC-05:00 at epicenter

Location
0.511°N 77.825°W depth=10.0km (6.2mi)

Nearby Cities
9km (6mi) S of San Gabriel, Ecuador
37km (23mi) ENE of Ibarra, Ecuador
40km (25mi) SSW of Ipiales, Colombia
47km (29mi) ENE of Atuntaqui, Ecuador
113km (70mi) NE of Quito, Ecuador

Scientific Data
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Bizarro Earth

Japan's massive 2011 earthquake may trigger more, and larger, volcanic eruptions

Elaine Lies
Reuters
Fri, 17 Oct 2014 22:19 UTC
Image
© AFP Photo/Yoshikazu Tsuno
Snow-covered Mount Fuji is seen from Tokyo, Japan, on February 16, 2014
Japan's massive 2011 earthquake may trigger more, and larger, volcanic eruptions over the next few decades, perhaps even that of Mount Fuji - but predicting them remains close to impossible, a volcano expert said on Friday.

The nation last month suffered its worst volcanic disaster in nearly 90 years when Mount Ontake, its second tallest active volcano at 3,067 meters (10,062 feet), suddenly erupted, raining down ash and stone on hikers crowding the summit.

The eruption killed 56 people, exceeding the deaths in the 1980 eruption of Mount St Helens in the United States. Seven victims remain missing, and recovery efforts have been suspended until the spring.

Japan may well be moving into a period of increased volcanic activity touched off by the 9.0 magnitude earthquake of March 11, 2011, said Toshitsugu Fujii, a volcanologist and professor emeritus at the University of Tokyo.

"The 2011 quake convulsed all of underground Japan quite sharply, and due to that influence Japan's volcanoes may also become much more active," Fujii told reporters.

"It has been much too quiet here over the last century, so we can reasonably expect that there will be a number of large eruptions in the near future."
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Bizarro Earth

Four San Francisco fault lines have built up enough seismic strain to unleash destructive earthquakes

Becky Oskin
LiveScience
Tue, 14 Oct 2014 23:00 UTC
northern california fault lines

San Francisco Bay Area earthquake faults are drawn in red.
With several faults slicing through the San Francisco Bay Area, forecasting the next deadly earthquake becomes a question of when and where, not if.

Now researchers propose that four faults have built up enough seismic strain (stored energy) to unleash destructive earthquakes, according to a study published today (Oct. 13) in the Bulletin of the Seismological Society of America.

The quartet includes the Hayward Fault, the Rodgers Creek Fault, the Green Valley Fault and the Calaveras Fault. While all are smaller pieces of California's San Andreas Fault system, which is more than 800 miles (1,300 kilometers) long, the four faults are a serious threat because they directly underlie cities.
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Bizarro Earth

4 Northern California faults primed for major earthquakes

Ellen Knickmeyer
Associated Press via Yahoo News
Tue, 14 Oct 2014 19:02 UTC
Image

In this Aug. 24, 2014, file photo, pedestrians examine a crumbling facade following an earthquake at the Vintner's Collective tasting room in Napa, Calif.
Three fault segments running beneath Northern California and its roughly 15 million people are overdue for a major earthquake, including one section that lies near the dams and canals that supply much of the state's water, according to a geological study published Monday.

The three fault segments and one other in the region are loaded with enough tension to produce quakes of magnitude 6.8 or greater, according to a geological study published Monday.

They include the little-known Green Valley fault, which lies near key dams and aqueducts northeast of San Francisco. Underestimated by geologists until now, the fault running between the cities of Napa and Fairfield is primed for a magnitude-7.1 quake, according to researchers from the U.S. Geological Survey and San Francisco State University.

The water supplies of the San Francisco Bay Area, Southern California and the farm-rich Central Valley depend on the man-made water system that links to the Sacramento and San Joaquin rivers, noted James Lienkaemper, the U.S. Geological Survey geologist who was lead author of the study. The Green Valley fault is last believed to have ruptured sometime in the 1600s.
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