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Seismic Event Dossier16:45 Local (08:45 UTC)(just now)

M 7.9 earthquake Philippine Sea (Philippines)

A magnitude 7.9 (MW) earthquake occurred on 1913-03-14, 16:45 local time (08:45 UTC) (just now), centered Philippine Sea (101 km SE of General Santos, Philippines). The hypocenter was located at a shallow depth of 15 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#73 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes

A magnitude 7.9 earthquake struck ⁨Philippine Sea (Philippines)⁩ on March 14, 1913. Source: ⁨Offshore Davao Gulf⁩. Documented deaths: 138.

Documented Fatalities138Source: NOAA NCEI Significant Earthquake Database
Fault KinematicsActive Fault
Equivalent Energy10.68 Mt TNT

Magnitude

MW
M 7.9

10.68 Mt TNT

Depth

15 km
15 km

shallow (Shallow crustal)

PAGER Impact

red
> 1,000 fatalities

Injuries: > 5,000 · ~34.3M felt

Interactive Epicenter & Fault Map

5.54°N, 125.89°E
Fault5 km
Offshore Davao Gulf
Active Fault · ~15.0 mm/yr
Felt byMMI III+
~34.3M exposed
~15.2M strong shaking
Primary SolutionUSGS
USGS#iscgem914043reviewed
1 agencies reporting
Setting5.5°N
Mindanao Island & Trench
Philippine Sea (Marine)

Seismic Activity & Aftershock Sequence

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

M0.0M4.5M9.0100%50%0%MainshockMar 13, 04 PMMar 14, 04 AMMar 14, 04 PMMar 15, 04 AMMar 15, 04 PMMar 16, 04 AMMar 16, 04 PMMar 17, 04 AMM7.9
Hover or tap a point to inspect aftershocks and risk probability curve.
<35 km (Shallow)35–70 km (Intermediate)>70 km (Deep)Mainshock

Situation Monitoring

Continuous verification
Multi-agency verification of casualties, tsunami alerts, and seismic sequence

Key facts so far

Casualties
None expected (offshore epicenter)
Zero exposed population
Tsunami Status
No tsunami threat
NOAA PTWC & regional buoys
Citizen Felt Reports
0
Not felt / offshore epicenter
Macroseismic DYFI verification
Aftershock Sequence
Monitoring
Aftershocks expected (Omori law)
LightGBM hazard model forecast
Multi-agency seismic telemetry active. Awaiting wire headlines.

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
M7.9(Mw)Ref
15.0 kmRef
5.54°, 125.89°Origin
Authoritative
iscgem914043

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

3 settlements

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

TownDistanceIntensity
General Santos · South Cotabato101 kmMMI VIII
Davao · Davao Del Sur177 kmMMI VII
Cotabato · Shariff Kabunsuan260 kmMMI VI

Tectonic setting

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

Regional Seismic Profile

Mindanao Island & Trench

View live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for this zone.