Map Sep 6, 2018 M6.7 Hokkaido, Japan Earthquake Early Warning Times

Map showing the September 6, 2018 M6.7 Hokkaido, Japan EEW times, with the earthquake epicenter shown as a red star. The concentric circles denote the initial EEW warning times. The innermost dotted circle doesn’t include the 2-second communication latency, but the next dash-dotted circle does include the latency. Most residents in the area of the strongest shaking (red area) did not receive any warning, and 41 people were killed. (from Wald, 2020, see reference below)