Fig. 8
From: Earthquake early warning: what does “seconds before a strong hit” mean?
Observed intensity distribution for the 2011 Tohoku-Oki (Mw9). Intensities from 3 to 7 (IJMA) measured by instruments are shown at seismic stations (left) and the estimated distribution of intensities by contours (right) (the figures were downloaded from: http://www.data.jma.go.jp/svd/eqev/data/2011_03_11_tohoku/index.html). The intensity scale is color coded from 1 (white) to 7 (pink), and the red star shows the epicenter. The region with IJMA6− and greater has a stretch of over a few hundred kilometers along the Pacific coast