{"score":95,"level":"CRITICAL","radiusKm":53,"factors":[{"label":"Magnitude","weight":61,"detail":"M6.4 releases ~60k tons of TNT of energy."},{"label":"Depth","weight":12,"detail":"Hypocenter at 18 km depth. Shallow — strong surface coupling."},{"label":"Tsunami flag","weight":20,"detail":"USGS tsunami flag set — treat coastlines as exposed until all-clear."},{"label":"Exposure","weight":2,"detail":"Exposure baseline for a generic location."}],"actions":["Move to high ground immediately if you are near a coast — do not wait for sirens.","Stay off beaches, harbors and estuaries until an official all-clear.","Expect aftershocks: drop, cover and hold on during shaking; check gas and power lines after.","Treat as a major emergency: call local emergency services, avoid damaged buildings and bridges.","Share this briefing with people in the affected radius; keep phones free for emergencies."],"briefing":"M6.4 with tsunami flag at unspecified location — depth 18 km. Risk CRITICAL (95/100). Estimated felt radius ~53 km. Primary driver: Magnitude (+61). Move to high ground immediately if you are near a coast — do not wait for sirens.","seal":"tq384:1638df6b2da4862ee93d9a806ab15a4608c60c268c045232","engine":"terra-risk-v1 (deterministic, no key required)"}