Magnitude 5.0 quake in southern Ontario, Canada

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 Wednesday June 23 2010 at 10:41 AM (PDT) we recorded an earthquake (preliminary Mw 5.0) located in southern Ontario, Canada.

If you have felt this quake, 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 this tremor are indicated below. The epicentral distance (i.e. the distance separating the epicenter and the closest station in the recording network) for Anza is 3715 km (33.41 degrees).

This map shows the mainshock as a red star. Associated aftershocks 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
45.9550	-75.5460	06/23/10 (174) 17:41.43	06/23/10 (174) 10:41 AM	19	5.0	QED

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

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Of local interest

We operate a broadband station at Camp Elliot. At 10:48 (PDT) station CPE recorded the P wave from this event. Here is a view of that event 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 Camp Elliot

View a larger image showing the waveforms recorded at Cam Elliot.

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

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Learn more about the ANZA network (includes more station information, research, etc).