Fig. 1From: Causes of the N–S compressional aftershocks of the E–W compressional 2008 Iwate–Miyagi Nairiku earthquake (M7.2) in the northeastern Japan arcDistribution of calderas, tectonic lines, and earthquakes in the study area. Calderas and tectonic lines are from Nunohara et al. (2010) and Baba (2017), respectively. Epicenters of earthquakes in 2008 at depths ≤ 15 km are shown as black dots and are from the JMA unified catalog. The green star denotes the mainshock epicenter estimated by Okada et al. (2012)Back to article page