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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Earthquake early warning for the 2016 Kumamoto earthquake: performance evaluation of the current system and the next-generation methods of the Japan Meteorological Agency

Fig. 1

Spatiotemporal 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 AB 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)

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