Map of 2016 Kumamoto earthquake alert region. Dots display warning times (time between when the alert arrives and noticeable shaking starts) for different sites from the FinDer EEW algorithm. Contour lines show the maximum strength of ground shaking as measured on the Modified Mercalli Intensity (MMI) scale. Inside the orange line around the epicenter (pink star), shaking exceeded an MMI of 7.2. Warning times in these areas are generally short, often less than five seconds, but in some sites to the northeast warning times reach 10 seconds or more. Inside the yellow line, shaking exceeded an MMI of 5.6, causing windows to break and objects to fall off shelves. A five to fifteen -second warning is sufficient time to “drop, cover, hold on,” as recommended by the U.S. Geological Survey. Credit: Men-Andrin Meier

Map of 2016 Kumamoto earthquake alert region. Dots display warning times (time between when the alert arrives and noticeable shaking starts) for different sites from the FinDer EEW algorithm. Contour lines show the maximum strength of ground shaking as measured on the Modified Mercalli Intensity (MMI) scale. Inside the orange line around the epicenter (pink star), shaking exceeded an MMI of 7.2. Warning times in these areas are generally short, often less than five seconds, but in some sites to the northeast warning times reach 10 seconds or more. Inside the yellow line, shaking exceeded an MMI of 5.6, causing windows to break and objects to fall off shelves. A five to fifteen -second warning is sufficient time to "drop, cover, hold on," as recommended by the U.S. Geological Survey. Credit: Men-Andrin Meier

Map of 2016 Kumamoto earthquake alert region. Dots display warning times (time between when the alert arrives and noticeable shaking starts) for different sites from the FinDer EEW algorithm. Contour lines show the maximum strength of ground shaking as measured on the Modified Mercalli Intensity (MMI) scale. Inside the orange line around the epicenter (pink star), shaking exceeded an MMI of 7.2. Warning times in these areas are generally short, often less than five seconds, but in some sites to the northeast warning times reach 10 seconds or more. Inside the yellow line, shaking exceeded an MMI of 5.6, causing windows to break and objects to fall off shelves. A five to fifteen -second warning is sufficient time to “drop, cover, hold on,” as recommended by the U.S. Geological Survey. Credit: Men-Andrin Meier

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