Major Ocean Tsunami Generated (Historical Record)
This undersea earthquake generated recorded tsunami waves across coastal and trans-oceanic sectors. Preserved in seismic archive for scientific reference — no active hazard exists.
M 8.3 earthquake
Off the coast of Viña del Mar, Chile
A magnitude 8.3 (MW) earthquake occurred on 2015-09-16, 19:54 local time (22:54 UTC) (11y ago), centered Off the coast of Viña del Mar (163 km N, Chile). The hypocenter was located at a shallow depth of 22.4 km. Primary telemetry verified by USGS.
Historical Landmark Earthquake
#58 of All TimeCurated Global Seismic Archive (1700–Present)
A magnitude 8.3 earthquake struck Off the coast of Viña del Mar, Chile on 2015年9月16日. Source: Peru–Chile Trench. Documented deaths: 15.
マグニチュード
MW42.50 Mt TNT
震源の深さ
22.4 kmshallow (浅発・地殻内)
PAGER影響評価
red負傷者数: > 5,000 · ~15.8M 人が体感
震央・断層インタラクティブマップ
Seismic Activity & Aftershock Sequence
Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.
Situation Monitoring
Continuous verificationKey facts so far
Agency Discrepancy Matrix (Cross-Network Verification)
Comparing multi-network solutions from primary and teleseismic monitoring agencies.
| Network / Source | Magnitude (Scale & Diff) | Depth & Diff | Epicenter & Shift (Δd) | Consensus | Event ID / Data |
|---|---|---|---|---|---|
USGS United States Geological Survey · Global / US | M8.3(Mw)Ref | 22.4 kmRef | -31.57°, -71.67°Origin | Authoritative | us20003k7a |
Why do agency magnitudes differ? Seismological agencies use different instrumentation networks, crustal velocity models, and mathematical magnitude scales (e.g. Moment Magnitude Mw vs Local Richter ML vs Surface Wave Ms). Differences of 0.1–0.3 are common and reflect physical observation geometry rather than errors.
Where it was felt
6 か所の集落Shaking intensity is modelled from magnitude, depth and distance (GMPE attenuation), not reported by residents.
| Town | Distance | Intensity |
|---|---|---|
| Illapel · Coquimbo | 48 km | MMI IX |
| Salamanca · Coquimbo | 70 km | MMI IX |
| La Ligua · Valparaíso | 107 km | MMI VIII |
| Ovalle · Coquimbo | 118 km | MMI VIII |
| Quillota · Valparaíso | 151 km | MMI VIII |
| San Felipe · Valparaíso | 159 km | MMI VIII |
Tectonic setting
Nearest mapped active fault: Peru–Chile Trench, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).
中部チリ（サンティアゴ・バルパライソ）
このゾーンのリアルタイム地震モニタリング、過去の危険基準、断層すべりモデル、再来周期を表示。