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Slow earthquakes: Newly discovered interplate phenomena and possible connection to huge earthquakes


IPGP - Îlot Cuvier


Séminaires généraux de l’IPGP


Professor Kazushige Obara

Slow earthquakes have been discovered since the last two decades in many subduction zones in the world based on development of observation system and detection methods. Slow earthquakes are composed of various types of events with different time scale and roughly classified into geodetic and seismic events. In spatial domain, slow earthquakes are distributed in the updip and downdip sides of the huge earthquake seismogenic zone along the subducting plate interface. These slow earthquakes are considered as transitional phenomena at the transition zone between locked and stable sliding zones as modeling studies predicted. These slow earthquakes indicate many characteristic activity pattern which might be related to the occurrence of huge earthquakes. In this presentation, I will introduce discovery process of various slow earthquakes, characteristic activity pattern and possible connection to huge earthquakes.