M6.3 earthquake 93 km SSE of Pondaguitan, Philippines
A magnitude 6.3 earthquake struck 93 km SSE of Pondaguitan, Philippines on Fri, Jul 15, 1983, 3:47 AM GMT+8 (19:47 UTC), 43 km (27 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.3 (Mw, moment), strong
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-07-14 19:47:46 UTC
- Depth
- 43.0 km (26.7 mi), shallow
- Epicenter
- 5.557° N, 126.452° E
- Region
- Philippines
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 6.3 | Mw, moment | USGS National Earthquake Information Center | Preferred · Reviewed |
| 6.21 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 6.2 | Mwc, centroid moment | Global CMT project | Preliminary |
What happened
The USGS’s account of the effects of this earthquake.
[FS]. FAULT PLANE SOLUTION: P-WAVES NP1:STRIKE=40;DIP=65;SLIP=120 NP2:STRIKE=166;DIP=38;SLIP=43 PRINCIPAL AXES: (T) PLG=59; AZM=353 (P) PLG=15; AZM=109 COMMENT: Moderately well controlled reverse fault type mechanism with a fair amount of left-lateral strike-slip component. NP2 designated as the fault plane. MOMENT TENSOR SOLUTION NO OF STA 10 SCALE 10**25 D-CM DEPTH 34 PRINCIPAL AXES: (T) VAL=3.21; PLG=61; AZM=310 (N) VAL=-0.64; PLG=5; AZM=49 (P) VAL=-2.57; PLG=28; AZM=142 BEST DOUBLE COUPLE:Mo=2.9*10**25 NP1:STRIKE=246;DIP=17;SLIP=108 NP2:STRIKE=48;DIP=73;SLIP=85 CENTROID, MOMENT TENSOR SOLUTION HARVARD EVENT-FILE NAME B071483A DATA USED: GDSN L.P. BODY WAVES: 21S, 55C, T=45 CENTROID LOCATION: ORIGIN TIME 19:47:50.2 0.2 LAT 5.57N 0.02;LON 126.58E 0.03 DEP 32.5 2.1;HALF-DURATION 4.8 MOMENT TENSOR; SCALE 10**25 D-CM MRR=1.42 0.05; MTT=0.24 0.05 MFF=-1.66 0.08; MRT=0.88 0.08 MRF=1.84 0.13; MTF=0.20 0.04 PRINCIPAL AXES: 1.(T) VAL=2.60;PLG=59;AZM=312 2.(N) -0.07; 17; 193 3.(P) -2.53; 26; 95 BEST DOUBLE COUPLE:M0=2.6*10**25 NP1:STRIKE=152;DIP=24;SLIP=46 NP2:Strike=18;Dip=73;Slip=107
From the USGS event page for usp0001wtb. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 3.3 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.7103 km SSE of Pondaguitan, Philippines · 15785 days ago · 49 km deep · 9 km away
- 4.795 km ESE of Caburan, Philippines · 15785 days ago · 33 km deep · 6 km away
- 5.299 km SSE of Pondaguitan, Philippines · 15784 days ago · 45 km deep · 7 km away
- 4.794 km SSE of Pondaguitan, Philippines · 15784 days ago · 33 km deep · 16 km away
- 5.2110 km ESE of Caburan, Philippines · 15783 days ago · 50 km deep · 19 km away
- 4.590 km ESE of Caburan, Philippines · 15781 days ago · 84 km deep · 17 km away
- 5.2111 km SSE of Pondaguitan, Philippines · 15770 days ago · 53 km deep · 19 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001wtb (also filed as gcmtb071483a, gcmt19830714194746, iscgem572135). Read Fri, Oct 2, 2026, 5:01 AM UTC.