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 7.1 earthquake
Sicily, Italy
A magnitude 7.1 (MW) earthquake occurred on 1908-12-28, 05:20 local time (04:20 UTC) (117y ago), centered 86 km NE of Catania (Italy). The hypocenter was located at a shallow depth of 10 km. Primary telemetry verified by USGS/ISC-GEM.
Historical Landmark Earthquake
#34 of All TimeCurated Global Seismic Archive (1700–Present)
A magnitude 7.1 earthquake struck Sicily, Italy on 1908年12月28日. Source: Messina Straits Blind Normal Fault. Documented deaths: 80,000.
マグニチュード
MW673.6 kt TNT
震源の深さ
10 kmshallow (浅発・地殻内)
PAGER影響評価
red負傷者数: > 5,000 · ~66.5M 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 | M7.1(Mw)Ref | 10.0 kmRef | 38.15°, 15.60°Origin | Authoritative | official19081228042027_30 |
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 |
|---|---|---|
| Reggio di Calabria · Calabria | 5.3 km | MMI X |
| Messina · Sicily | 7.1 km | MMI X |
| Vibo Valentia · Calabria | 72 km | MMI VII |
| Catania · Sicily | 86 km | MMI VII |
| Catanzaro · Calabria | 121 km | MMI VI |
| Siracusa · Sicily | 123 km | MMI VI |
Tectonic setting
Nearest mapped active fault: Messina Straits Blind Normal Fault, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).
シチリア・カラブリア・カンピフレグレイ
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。