Fig. 1From: Seismic observation using distributed acoustic sensing around the Tsugaru Strait at the Japan and Kuril Trenches, northeastern JapanDistribution of epicenters of earthquakes detected by distributed acoustic sensing (DAS) measurement and listed in the Japan Meteorological Agency (JMA) earthquake catalog. a Earthquakes around Japan and b zoomed up around Tsugaru Strait shown by the red rectangle in a. Black lines are trenches. The fiber-optic cable used for DAS measurement exists in the zone with red hatchingBack to article page