Earthquake off Hamakua Coast of Big Island, NO tsunami threat

October 29, 2010, 3:18 PM HST · Updated October 31, 7:31 PM

By Wendy Osher

A moderate earthquake was reported off the Hamakua Coast of the Big Island this afternoon (Friday, October 29, 2010). The preliminary magnitude was measured at 4.3 by the Hawaii Volcanoes Observatory, and 3.9 by the U.S. Geological Survey. The quake was first reported at 3:09 p.m. at the 20.2 North, 155.5 West coordinates. That’s 40 miles NW of Hilo, Hawaii or 55 miles SE of Hana, Maui. The Pacific Tsunami Warning Center said there is NO tsunami threat to Hawaii. Repeat, there is NO tsunami threat to Hawaii, however areas did experience shaking including parts of Maui. Although the quake was centered off the Big Island, we did recieve reports of shaking in both the Paia and Central Maui areas. Initial reports from the Hawaii County Civil Defense Agency indicate no initial signs of damage or injury.

Date-TimeFriday, October 29, 2010 at 03:09:25 PM at epicenter Time of Earthquake in other Time Zones
Location20.127°N, 155.500°W
Depth11.3 km (7.0 miles) (poorly constrained)
Distances60 km (40 miles) NW of Hilo, Hawai`i, Hawaii
70 km (40 miles) NE of Kailua Kona, Hawai`i, Hawaii
85 km (55 miles) SE of Hana, Maui, Hawaii
280 km (175 miles) ESE of HONOLULU, Hawaii
Location Uncertaintyhorizontal +/- 3.6 km (2.2 miles); depth +/- 15.6 km (9.7 miles)
ParametersNph= 41, Dmin=60 km, Rmss=0.11 sec, Gp=277°,
M-type=duration magnitude (Md), Version=1
Event IDhv60187981


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