Fig. 1From: Earthquake early warning for the 2016 Kumamoto earthquake: performance evaluation of the current system and the next-generation methods of the Japan Meteorological AgencySpatiotemporal patterns of seismic activity in the Kumamoto earthquake sequence (modified from JMA 2016) and the number of cases where the JMA EEW system issued a warning. a Epicenter distribution of the Kumamoto earthquake sequence from April 14 to 30 (M ≥ 3.5). Blue circles indicate earthquakes that occurred before April 16 at 01:25. Red circles represent earthquakes that occurred on or after April 16 at 01:25. b Detailed spatiotemporal distribution for the rectangular area A–B in (a). A definition of the symbols is the same as in (a). c Histogram of the daily number of cases where the system issued a warning for the Kumamoto earthquake sequence. A black line indicates the number of earthquakes shown in (b)Back to article page