Earth Watch Report – Friday August 31st, 2012
August 31, 2012 by desertrose
LISS – Live Internet Seismic Server
GSN Stations
These data update automatically every 30 minutes. Last update: August 31, 2012 08:19:06 UTC
Seismograms may take several moments to load. Click on a plot to see larger image.
CU/ANWB, Willy Bob, Antigua and Barbuda
CU/BBGH, Gun Hill, Barbados
CU/BCIP, Isla Barro Colorado, Panama
CU/GRGR, Grenville, Grenada
CU/GTBY, Guantanamo Bay, Cuba
CU/MTDJ, Mount Denham, Jamaica
CU/TGUH, Tegucigalpa, Honduras
IC/BJT, Baijiatuan, Beijing, China
IC/ENH, Enshi, China
IC/HIA, Hailar, Neimenggu Province, China
IC/LSA, Lhasa, China
IC/MDJ, Mudanjiang, China
IC/QIZ, Qiongzhong, Guangduong Province, China
IU/AFI, Afiamalu, Samoa
IU/ANMO, Albuquerque, New Mexico, USA
IU/ANTO, Ankara, Turkey
IU/BBSR, Bermuda
IU/CASY, Casey, Antarctica
IU/CCM, Cathedral Cave, Missouri, USA
IU/CHTO, Chiang Mai, Thailand
IU/COLA, College Outpost, Alaska, USA
IU/COR, Corvallis, Oregon, USA
IU/CTAO, Charters Towers, Australia
IU/DAV,Davao, Philippines
IU/DWPF,Disney Wilderness Preserve, Florida, USA
IU/FUNA,Funafuti, Tuvalu
IU/GNI, Garni, Armenia
IU/GRFO, Grafenberg, Germany
IU/GUMO, Guam, Mariana Islands
IU/HKT, Hockley, Texas, USA
IU/HNR, Honiara, Solomon Islands
IU/HRV, Adam Dziewonski Observatory (Oak Ridge), Massachusetts, USA
IU/INCN, Inchon, Republic of Korea
IU/JOHN, Johnston Island, Pacific Ocean
IU/KBS, Ny-Alesund, Spitzbergen, Norway
IU/KEV, Kevo, Finland
IU/KIEV, Kiev, Ukraine
IU/KIP, Kipapa, Hawaii, USA
IU/KMBO, Kilima Mbogo, Kenya
IU/KNTN, Kanton Island, Kiribati
IU/KONO, Kongsberg, Norway
IU/KOWA, Kowa, Mali
IU/LCO, Las Campanas Astronomical Observatory, Chile
IU/LSZ, Lusaka, Zambia
IU/LVC, Limon Verde, Chile
IU/MA2, Magadan, Russia
IU/MAJO, Matsushiro, Japan
IU/MAKZ,Makanchi, Kazakhstan
IU/MBWA, Marble Bar, Western Australia
IU/MIDW, Midway Island, Pacific Ocean, USA
IU/NWAO, Narrogin, Australia
IU/OTAV, Otavalo, Ecuador
IU/PAB, San Pablo, Spain
IU/PAYG Puerto Ayora, Galapagos Islands
IU/PET, Petropavlovsk, Russia
IU/PMG, Port Moresby, Papua New Guinea
IU/PMSA, Palmer Station, Antarctica
IU/POHA, Pohakaloa, Hawaii
IU/PTCN, Pitcairn Island, South Pacific
IU/PTGA, Pitinga, Brazil
IU/QSPA, South Pole, Antarctica
IU/RAO, Raoul, Kermandec Islands
IU/RAR, Rarotonga, Cook Islands
IU/RCBR, Riachuelo, Brazil
IU/RSSD, Black Hills, South Dakota, USA
IU/SAML, Samuel, Brazil
IU/SBA, Scott Base, Antarctica
IU/SDV, Santo Domingo, Venezuela
IU/SFJD, Sondre Stromfjord, Greenland
IU/SJG, San Juan, Puerto Rico
IU/SLBS, Sierra la Laguna Baja California Sur, Mexico
IU/SNZO, South Karori, New Zealand
IU/SSPA, Standing Stone, Pennsylvania USA
IU/TARA, Tarawa Island, Republic of Kiribati
IU/TATO, Taipei, Taiwan
IU/TEIG, Tepich, Yucatan, Mexico
IU/TIXI, Tiksi, Russia
IU/TRIS, Tristan da Cunha, Atlantic Ocean
IU/TRQA, Tornquist, Argentina
IU/TSUM, Tsumeb, Namibia
IU/TUC, Tucson, Arizona
IU/ULN, Ulaanbaatar, Mongolia
IU/WAKE, Wake Island, Pacific Ocean
IU/WCI, Wyandotte Cave, Indiana, USA
IU/WVT, Waverly, Tennessee, USA
IU/XMAS, Kiritimati Island, Republic of Kiribati
IU/YSS, Yuzhno Sakhalinsk, Russia
**********************************************************************************************************
Volcanic Activity
Earthquakes raise alert level at Alaska volcano
Related
A series of small earthquakes which began Wednesday night and continued into Thursday near a long-dormant volcanic peak in Alaska’s Aleutian Islands has prompted researchers to raise the alert level for the Little Sitkin volcano.
The nearly 4,000-foot-high Little Sitkin volcano is named for the island where it resides, located in the Rat Islands in the Aleutian chain. The volcano has shown little activity since scientists have started observing it, with only three questionable eruptive events at the volcano since that time. The most recent eruption may have come in 1900, according to the Alaska Volcano Observatory.
Still, the AVO page for Little Sitkin mentions there may have been a “cataclysmic eruption” on the island sometime after the last ice age, which ended more than 11,000 years ago.
Seismic equipment located near the volcano began detecting a “swarm of high-frequency earthquakes” at about 7:15 p.m. Wednesday, the AVO reports. The earthquakes continued through the night into Thursday, prompting the alert level at the volcano being raised. The alert level is currently at yellow, which means that the “volcano is exhibiting signs of elevated unrest above known background level.” Additionally, aircraft traveling in the area are advised to exercise caution.
The volcano is located in a remote part of the Aleutians, about 35 miles northwest of the World War II outpost of Amchitka and 200 miles west of Adak.
Little Sitkin joins two other Alaska volcanoes, Iliamna and Cleveland, currently sitting at elevated alert levels.
Iliamna, 130 miles from Anchorage, Alaska’s largest city, was first elevated in March of this year following a continued increase in seismic activity.
“The current level of activity at Iliamna does not indicate an imminent or certain eruption,” a status update from the AVO said Thursday. “Seismic activity, along with gas emissions, appear to be declining gradually.”
Meanwhile, the oft-erupting Cleveland volcano which, like Sitkin, is located in the Aleutians, remains elevated as well. Cleveland has been upgraded a half-dozen times in since 2010 alone, and most recently erupted in June, when a pilot reported an ash cloud reaching up to 35,000 feet. Cleveland sits at a higher alert level than Iliamna or Little Sitkin, meaning the volcano still has a higher potential for eruption at any time.
For updates on these and other volcanoes across Alaska, visit the Alaska Volcano Observatory.
Contact Ben Anderson at ben(at)alaskadispatch.com
| Today | Volcano Activity | USA | State of Alaska, [Little Sitkin Volcano] |  |
 |
Volcano Activity in USA on Friday, 31 August, 2012 at 02:27 (02:27 AM) UTC.
| Description | |
| Seismologists say a cluster of earthquakes has been detected at a remote volcano in Alaska’s western Aleutian Islands. The Alaska Volcano Observatory says the quakes began Wednesday evening at Little Sitkin Volcano and are continuing as of Thursday morning. No eruption has been detected. Scientist in charge John Power says there is no direct link to the swarm of earthquakes at Little Sitkin and a cluster of quakes that shook California’s Imperial County earlier this week. Powers says Little Sitkin is located on an uninhabited island and is far from any populated areas. He says the seismic activity is unusual for Little Sitkin, whose last eruption possibly in the early 1900s is questionable. Powers says the concern about an eruption would be the possible threat posed to aircraft. |
Comments