Magnitude 6.9 & 7.3 quake in the New Britain region, Papua New Guinea

Last updated: 2018-03-26 (84) 17:50:55 UTC

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The Anza group at the University of California San Diego operates a broadband seismograph network consisting of 17 three component broadband seismograph stations centered near Anza, California (see map).

On Sunday July 18 2010 at 6:04 AM (PDT) and 6:35 AM (PDT) we recorded earthquakes (preliminary Mw 6.9 and Mw 7.3 respectively) located in the New Britain region, Papua New Guinea.

If you have felt these quakes, the USGS would like to know. Please add your comments to the USGS page "Did you feel it?".

View the most recent map of local events near San Diego or a slightly wider regional view of events recorded by ANZA, or a map of events recorded by ANZA from around the globe.

Initial source parameters for these tremors are indicated below. The epicentral distance (i.e. the distance separating the Mw 7.3 epicenter and the closest station in the recording network) for Anza is 10471 km (94.08 degrees).

This map shows the mainshock as a red star. Associated preshocks are orange stars. Anza network stations are yellow triangles. Blue lines are major rivers. Thin black lines are state boundaries and thick black lines are national boundaries.

Event Map

Event Parameters

Latitude	Longitude	Origin time (UTC)	Origin time (PDT)	Depth (km)	Mw	Author
-6.1160	150.5220	07/18/10 (199) 13:04.13	07/18/10 (199) 6:04 AM	57.5	6.9	QED
-6.0190	150.4970	07/18/10 (199) 13:35.03	07/18/10 (199) 6:35 AM	57.6	7.3	QED

* The location and magnitude determined for this event are preliminary and are subject to change upon further review of seismic data.

You may also view a plot showing

Of local interest

We operate a broadband station on Mt. Soledad. At 06:17 (PDT) and then 06:48 (PDT) station SOL recorded the P waves from these events. Here is a view of those events as picked by our analyst. A red P indicates a P wave arrival, a red S indicates an S wave arrival.

3 component seismometer recordings at Soledad

View a larger image showing the waveforms recorded at Mt. Soledad.

Visit the IRIS website with additional links to seismic data for this event.

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Learn more about the Anza group (including who works here, other networks, nuclear tests in China/India/Pakistan).
Learn more about the ANZA network (includes more station information, research, etc).