Early-est:     Alaska Peninsula    2025.12.07-22:17:57.58    q:B      mb:5.0    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765145877506.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765145877506.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765145877506.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765145877506.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: 5.0 [41]    Mwp: - [0]    Mwpd: - [0]
Region: Alaska Peninsula
Origin Time: 2025.12.07-22:17:57.58 UTC
Hypocenter: lat: 54.65°  lon: -160.27°  [+/-16km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 79   usedPhases: 53
minDist: 5.3°   maxDist: 151.3°   AzGap: 109°   2ndAzGap: 159°   atten: -0.72 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 16km   azMaxHorUnc: 1°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 180°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 82°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [27]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [23]
Closest plate boundaries:
   North America / Pacific [subduction zone]: distance: ~100km
Subduction geometry:    Zone: Alaska-Aleutians    Slab depth at epicenter: 29km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       29km
       -
       -
./hypo.1765145877506.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 120°   dip: 29°   rake: 29°
Nodal Plane 2: strike: 4°   dip: 77°   rake: 116°
Quality: azimuthalGap: -1°   stationPolarityCount: 50   misfitWeightCount: 6.5   misfit: 0.12   stationDistributionRatio: 0.31   meanDistP: 37.5   meanDistT: 33.8   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765145877506.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 159°   stationPolarityCount: 50   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765145877506.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.1765145877506.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.1765145877506.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765145877506
Event info last updated: 2025.12.07-23:18:07 UTC
Event first association/location: 2025.12.07-22:25:45 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI