Which foreshock occurred before the main Japan earthquake of March 11 2011?

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earthquake damage, Honshu, Japan, 2011 — Japan earthquake and tsunami of 2011 Aerial view of damage to a portion of the northeastern coast of Honshu, Japan, following the offshore earthquake and resultant tsunami there on March 11, 2011.

The main earthquake that struck Japan on March 11, 2011, was preceded by several foreshocks. Among these was a magnitude-7.2 event, which was centered approximately 25 miles (40 km) away from the epicenter of the main earthquake.1