Strong and shallow M6.6 earthquake hits Andreanof Islands, Alaska

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A strong and shallow earthquake registered by the USGS as M6.6 hit the Andreanof Islands, Aleutian Islands, Alaska at 21:57 UTC on August 15, 2018. The agency is reporting a depth of 31.6 km (19.6 miles). EMSC is reporting M6.6 at a depth of 40 km (24.8 miles).

According to the USGS, the epicenter was located 41 km (25 miles) S of Tanaga volcano, 108 km (67 miles) WSW of Adak (population 332), Alaska and 1 477 km (918 miles) ESE of Klyuchi (population 10 000), Russia.

There are no people living within 100 km (62 miles).

Based on all available data, there is no tsunami threat from this earthquake, PTWC said.

The USGS issued a green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.

Regional seismicity

Featured image credit: USGS, EMSC

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