Early-est:     Southern Sumatra, Indonesia    2025.12.14-00:58:12.26    q:B      mb:5.2    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765673893260.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765673893260.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765673893260.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765673893260.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 5.2 [70]    Mwp: - [0]    Mwpd: - [0]
Region: Southern Sumatra, Indonesia
Origin Time: 2025.12.14-00:58:12.26 UTC
Hypocenter: lat: -3.31°  lon: 101.16°  [+/-15km]    depth: 20km  [+/-35km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 129   usedPhases: 88
minDist: 5.8°   maxDist: 151.8°   AzGap: 97°   2ndAzGap: 102°   atten: -1.02 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 121°
68%ConfEllipsoid:   semiMajorAxisLength: 35km   majorAxisAzimuth: 252°   majorAxisPlunge: 82°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 138°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [45]    Td: 0.8Xs [3]    Td*T50Ex: - [0]    To: 2.1s [37]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~160km
Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 42km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (160km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       20km
       20km
       20km
Slab depth at epicenter:
       42km
       -
       -
./hypo.1765673893260.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 9°   dip: 74°   rake: -167°
Nodal Plane 2: strike: 275°   dip: 77°   rake: -17°
Quality: azimuthalGap: -1°   stationPolarityCount: 86   misfitWeightCount: 11.1   misfit: 0.16   stationDistributionRatio: 0.33   meanDistP: 45.5   meanDistT: 32.7   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765673893260.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 14°   dip: 74°   rake: -163°
Nodal Plane 2: strike: 279°   dip: 74°   rake: -16°
Quality: azimuthalGap: 101°   stationPolarityCount: 86   misfit: 0.29   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 16.11   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765673893260.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
./hypo.1765673893260.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp
./hypo.1765673893260.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765673893260
Event info last updated: 2025.12.14-01:59:02 UTC
Event first association/location: 2025.12.14-01:04:29 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI