Strong Aftershock, Fiordland

A strong aftershock was recorded off the Fiordland coast last night, continuing the series of quakes that has been felt since July 15th.

Thursday 6th August 2009

A magnitude 5.9 earthquake struck off the coast of Fiordland at 8:31 last night. The quake was located 200 km north-west of Invercargill (120 km west of Te Anau) at a depth of 5 km. The U.S. Geological Survey reports the quake as magnitude 6.1 at a depth of 10 km. The shaking from the event was felt throughout Fiordland, Southland, Otago and South Canterbury, attracting 338 reports from the public by midnight.

A smaller event estimated to be just under magnitude 5 followed at 10:10 p.m.

The earthquakes are the latest events in the ongoing earthquake activity following the magnitude 7.6 Dusky Sound earthquake of July 15th. Three earthquakes with magnitudes between 4.8 and 5.9 were reported in the area by GeoNet yesterday, with another just after 10 p.m. to be analysed.

Last night’s magnitude 5.9 quake is the fourth biggest aftershock in the series which includes another magnitude 5.9 event on July 16th, a magnitude 6.0 quake on July 17th and a magnitude 6.1 earthquake shortly after the main event on July 15th.

[Compiled from data provided by the GeoNet project and its sponsors EQC, GNS Science and FRST; and the US Geological Survey and its contributing agencies.]

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