Abstract

Seismic-reflection data and historical accounts suggest that a large submarine slump in the Dead Sea was produced by the most recent large earthquake along the Dead Sea-Jordan transform plate boundary, the ML 6.25 Jericho earthquake of July 11, 1927. The correlation supports the use of seismically triggered slump, landslide, and other sediment failures in lakes to infer the timing of paleoearthquakes. Furthermore, the location of the submarine slump adds to evidence that the 1927 earthquake was caused by rupture on a fault segment beneath the north basin of the Dead Sea. This fault rupture implies that the strain accumulation on the Jordan fault north of the Dead Sea is higher than previously recognized. Older seismically triggered slumps buried beneath the 1927 slump show that a record of ancient Jericho earthquakes can also be found in the sedimentary record. The estimated number and age range of these slumps suggest a long average earthquake recurrence time.

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