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Seismic Event Dossier12:07 Local (16:07 UTC)(baru saja)

Earthquake near Valparaíso, Chile

A magnitude 8.1 (MW) earthquake occurred on 1943-04-06, 12:07 local time (16:07 UTC) (baru saja), centered 197 km N of Viña del Mar (Chile). The hypocenter was located at a intermediate depth of 35 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#51 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes
Gempa bumi bersejarah berkekuatan M8.1 yang terjadi pada 1943-04-06 di Chile.
Documented Fatalities> 1,000
Fault KinematicsActive Fault
Equivalent Energy21.30 Mt TNT

Magnitudo

MW
M 8.1

21.30 Mt TNT

Kedalaman

35 km
35 km

intermediate (35–70 km (Menengah))

Dampak PAGER

red
> 1,000 fatalities

Luka-luka: > 5,000 · ~13.4M merasakan

Peta Interaktif Episenter & Sesar

31.26°S, 71.37°W
Sesar5 km
Unnamed Fault
Active Fault · ~15.0 mm/yr
Felt byMMI III+
~13.4M exposed
~8.2M strong shaking
Primary SolutionUSGS
USGS#iscgem899789reviewed
1 agencies reporting
Setting31.3°S
Cile Tengah (Santiago & Valparaíso)
Continental / Inland crustal

Seismic Activity & Aftershock Sequence

Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.

M0.0M4.5M9.0100%50%0%Gempa utama7 Apr9 Apr11 Apr13 Apr15 Apr17 AprM8.1
Hover or tap a point to inspect aftershocks and risk probability curve.
<35 km (Dangkal / Merusak)35–70 km (Menengah)>70 km (Fokus Dalam)Gempa utama
Prakiraan Risiko ML:12h37%24h49%72h64%7d80%

Verified Disaster & Impact Assessment

Official emergency management data cross-checked against multi-agency wires

Continuous verification
Casualties
Damage assessment in progress
Tsunami Status
No tsunami threat
NOAA PTWC & regional buoys
Citizen Felt Reports
0
No felt reports submitted
Macroseismic DYFI verification
Aftershock Sequence
Aftershocks: 3
High Omori aftershock probability
LightGBM hazard model forecast

Agency Discrepancy Matrix (Cross-Network Verification)

Comparing multi-network solutions from primary and teleseismic monitoring agencies.

Network / SourceMagnitude (Scale & Diff)Depth & DiffEpicenter & Shift (Δd)ConsensusEvent ID / Data
USGS
United States Geological Survey · Global / US
M8.1(Mw)Ref
35.0 kmRef
-31.26°, -71.37°Origin
Authoritative
iscgem899789

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 permukiman

Shaking intensity is modelled from magnitude, depth and distance (GMPE attenuation), not reported by residents.

TownDistanceIntensity
Illapel · Coquimbo45 kmMMI IX
Salamanca · Coquimbo68 kmMMI IX
Ovalle · Coquimbo76 kmMMI VIII
La Ligua · Valparaíso134 kmMMI VIII
Coquimbo · Coquimbo146 kmMMI VIII
La Serena · Coquimbo152 kmMMI VII

Tectonic setting

Nearest mapped active fault: Unnamed Fault, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).

Profil Seismik Regional

Cile Tengah (Santiago & Valparaíso)

Lihat pemantauan seismik langsung, tolok ukur bahaya historis, model pergeseran sesar, dan interval perulangan untuk zona ini.