Early-est:     Southeastern Alaska    2025.12.08-00:56:53.33    q:A      mb:5.3    Mwp:5.7    Mwpd:-    Td*T50Ex:1.3     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 5.3 [146]    Mwp: 5.7 [9]    Mwpd: 5.9Xinv [4] Region: Southeastern Alaska Origin Time: 2025.12.08-00:56:53.33 UTC Hypocenter: lat: 60.37°  lon: -139.54°  [+/-7km]    depth: 10km  [+/-7km] Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 199   usedPhases: 166 minDist: 4.0°   maxDist: 159.8°   AzGap: 74°   2ndAzGap: 100°   atten: -0.88 [+/-0.19] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 7km   azMaxHorUnc: 166° 68%ConfEllipsoid:   semiMajorAxisLength: 9km   majorAxisAzimuth: 345°   majorAxisPlunge: 2°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 255°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 7km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.5 [113]    Td: 2.6s [12]    Td*T50Ex: 1.3 [12]    To: 3.3s [101] Closest plate boundaries:    North America - Pacific [continental convergent boundary]: distance: ~30km    North America / Pacific [subduction zone]: distance: ~370km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  no  YES (30km)  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    1.3    1.3    1.3 Td*To:      8.6      8.6      8.6 Mwp magnitude:        5.7        5.7        5.7 Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 75°   dip: 65°   rake: 13° Nodal Plane 2: strike: 339°   dip: 78°   rake: 155° Quality: azimuthalGap: -1°   stationPolarityCount: 151   misfitWeightCount: 19.5   misfit: 0.22   stationDistributionRatio: 0.39   meanDistP: 22.6   meanDistT: 44.1   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 326°   dip: 75°   rake: -167° Nodal Plane 2: strike: 232°   dip: 77°   rake: -15° Quality: azimuthalGap: 73°   stationPolarityCount: 151   misfit: 0.43   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 25.54   fracAcc30degPref: 0.80   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 169°   dip: 73°   rake: -175° Nodal Plane 2: strike: 77°   dip: 85°   rake: -17° Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 6.1   misfit: 9999.90   stationDistributionRatio: 0.34   meanDistP: 23.2   meanDistT: 35.9   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
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

Event ID: smi:KOERI/ee/event/1765155412048
Event info last updated: 2025.12.08-01:57:15 UTC
Event first association/location: 2025.12.08-01:01:18 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI