Early-est:     W. Caroline Islands, Micronesia    2025.11.11-15:34:50.66    q:C      mb:4.8    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1762875290655.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1762875290655.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1762875290655.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1762875290655.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: 4.8 [16]    Mwp: - [0]    Mwpd: - [0]
Region: W. Caroline Islands, Micronesia
Origin Time: 2025.11.11-15:34:50.66 UTC
Hypocenter: lat: 11.95°  lon: 140.71°  [+/-15km]    depth: 16km  [+/-19km]
Location Quality: qualityCode:  C     stdErr: 0.9s   assocPhases: 44   usedPhases: 17
minDist: 7.7°   maxDist: 151.7°   AzGap: 91°   2ndAzGap: 117°   atten: -0.78 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 25°
68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 206°   majorAxisPlunge: 47°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 297°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.4s [8]
Closest plate boundaries:
   Philippine Sea / Pacific [subduction zone]: distance: ~120km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (120km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       16km
       16km
       16km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1762875290655.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 158°   dip: 24°   rake: 60°
Nodal Plane 2: strike: 10°   dip: 69°   rake: 103°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 5.0   misfit: 0.09   stationDistributionRatio: 0.53   meanDistP: 43.0   meanDistT: 31.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1762875290655.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 349°   dip: 51°   rake: 84°
Nodal Plane 2: strike: 179°   dip: 40°   rake: 98°
Quality: azimuthalGap: 91°   stationPolarityCount: 17   misfit: 0.31   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 41.43   fracAcc30degPref: 0.43   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1762875290655.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: 0°
Nodal Plane 2: strike: 270°   dip: 90°   rake: 90°
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.1762875290655.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: 0°
Nodal Plane 2: strike: 270°   dip: 90°   rake: 90°
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.1762875290655.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1762875290655
Event info last updated: 2025.11.11-16:35:13 UTC
Event first association/location: 2025.11.11-16:15:48 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI