M7.6 – 169km WNW of Iberia, Peru and M7.6 – 210km S of Tarauaca, Brazil – November 24, 2015

by

Peru
click here for USGS Tectonic Summary

2015-11-24 22:45:38 (UTC)
Magnitude 7.6169km (105mi) WNW of Iberia, Peru
Peru-Brazil border
-10.548°S   -70.904°W
depth=600.6 km (373.2 mi)

2015-11-24 22:50:53 (UTC)
Magnitude 7.6
210km (130mi) S of Tarauaca, Brazil
Peru-Brazil border
-10.047°S   -71.023°W
depth=611.7 km (380.1 mi)

From the USGS Tectonic Summary
“Both earthquakes occurred as the result of normal faulting at a depth of approximately 600 km, almost 1000 kilometers east of the Peru-Chile Trench within the subducted oceanic lithosphere of the Nazca plate. At the location of the earthquakes, the Nazca plate subducts to the east under the South America plate at a velocity of about 69 mm/yr.

The events were separated by approximately 50 km horizontally – slightly more than typical location uncertainties of global earthquakes – and just 6 km vertically.  The latter earthquake was almost certainly triggered by the earlier event. Seismologists sometimes refer to a pair of similarly sized earthquakes that occur at nearly the same time and location as an earthquake “doublet.”

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