Washington An earthquake measuring 7.4 on the Richter scale hit the Pacific Ocean 172 miles east off the coast of Atka, Alaska, United States (U.S.) on Thursday night so that a tsunami warning imposed in parts of coastal Alaska.The second earthquake measuring 7.2 Richter scale in the same area and at the same depth, which is about 40 km, occurred half a minute later, the agency said the United States Geological Survey (USGS). The quake occurred at 18:09 local time .
"Tsunami Warning daera now enforced in areas that include coastal areas of Alaska from Unimak Pass 130km northeast of Dutch Harbor until the Amchitka Pass, Alsaka ," Tsunami Warning Center said the West Coast and Alaska.This does not include the entire coast of Alaska peninsula and the rest of mainland Alaska.
Center was monitoring the tsunami risk is only on the west coast of North America from the Mexican border to Alaska.Tsunami warning means all coastal residents in the warning area near the coast or in low areas should be evacuated to places of higher and away from harbors and coves, including those dealing directly with the sea.Earthquakes in the magnitude as that normally cause a tsunami. If a tsunami happens, it will first waves hit Alaska at 20:12 local time
Earthquake Details
Magnitude
7.2
Date-Time
Friday, June 24, 2011 at 03:09:40 UTC
Thursday, June 23, 2011 at 06:09:40 PM at epicenter
Time of Earthquake in other Time Zones
Location
52.008°N, 171.859°W
Depth
62.6 km (38.9 miles)
Region
FOX ISLANDS, ALEUTIAN ISLANDS, ALASKA
Distances
64 km (39 miles) SW of Amukta Island, Alaska
103 km (64 miles) SW of Yunaska Island, Alaska
1677 km (1042 miles) WSW of Anchorage, Alaska
2429 km (1509 miles) W of WHITEHORSE, Yukon Territory, Canada
Location Uncertainty
horizontal +/- 13.8 km (8.6 miles); depth +/- 5.3 km (3.3 miles)
Parameters
NST=784, Nph=791, Dmin=231.5 km, Rmss=1 sec, Gp= 29°,
M-type=teleseismic moment magnitude (Mw), Version=A
Source
USGS NEIC (WDCS-D)
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