Early-est:     Southeastern Alaska    2025.12.07-23:50:38.24    q:A      mb:5.0    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765151439590.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765151439590.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765151439590.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765151439590.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 [69]    Mwp: 4.9X [1]    Mwpd: - [0]
Region: Southeastern Alaska
Origin Time: 2025.12.07-23:50:38.24 UTC
Hypocenter: lat: 60.45°  lon: -140.03°  [+/-9km]    depth: 10km  [+/-8km]
Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 117   usedPhases: 89
minDist: 1.0°   maxDist: 160.0°   AzGap: 41°   2ndAzGap: 60°   atten: -0.93 [+/-0.18]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 7km   maxHorUnc: 9km   azMaxHorUnc: 98°
68%ConfEllipsoid:   semiMajorAxisLength: 11km   majorAxisAzimuth: 98°   majorAxisPlunge: 2°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 7°   intermediateAxisPlunge: 13°   semiMinorAxisLength: 8km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.5 [48]    Td: 5.8Xs [2]    Td*T50Ex: - [0]    To: 4.2s [37]
Closest plate boundaries:
   North America - Pacific [continental convergent boundary]: distance: ~10km
   North America / Pacific [subduction zone]: distance: ~340km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (10km)
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1765151439590.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 303°   dip: 35°   rake: 84°
Nodal Plane 2: strike: 131°   dip: 55°   rake: 94°
Quality: azimuthalGap: -1°   stationPolarityCount: 78   misfitWeightCount: 12.3   misfit: 0.13   stationDistributionRatio: 0.38   meanDistP: 32.7   meanDistT: 19.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765151439590.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 333°   dip: 31°   rake: 81°
Nodal Plane 2: strike: 163°   dip: 60°   rake: 95°
Quality: azimuthalGap: 60°   stationPolarityCount: 78   misfit: 0.27   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 39.85   fracAcc30degPref: 0.42   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765151439590.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.1765151439590.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.1765151439590.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765151439590
Event info last updated: 2025.12.08-00:50:49 UTC
Event first association/location: 2025.12.07-23:56:12 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI