Early-est:     Fox Islands, Aleutian Islands    2025.01.26-22:39:10.19    q:A      mb:5.2    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: 5.2 [145]    Mwp: 5.7 [8]    Mwpd: 5.8Xinv [2] Region: Fox Islands, Aleutian Islands Origin Time: 2025.01.26-22:39:10.19 UTC Hypocenter: lat: 53.13°  lon: -167.48°  [+/-16km]    depth: 16km  [+/-33km] Location Quality: qualityCode:  A     stdErr: 1.3s   assocPhases: 224   usedPhases: 174 minDist: 9.6°   maxDist: 160.3°   AzGap: 42°   2ndAzGap: 47°   atten: -1.23 [+/-0.15] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 32° 68%ConfEllipsoid:   semiMajorAxisLength: 35km   majorAxisAzimuth: 36°   majorAxisPlunge: 68°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 145°   intermediateAxisPlunge: 8°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [101]    Td: 2.3s [14]    Td*T50Ex: 1.3 [14]    To: 5.5s [90] Closest plate boundaries:    North America / Pacific [subduction zone]: distance: ~110km Subduction geometry:    Zone: Alaska-Aleutians    Slab depth at epicenter: 49km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (110km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.3    1.3    1.3 Td*To:      12.6      12.6      12.6 Mwp magnitude:        5.7        5.7        5.7 Hypocenter depth:        16km        16km        16km Slab depth at epicenter:        49km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 47°   dip: 81°   rake: -4° Nodal Plane 2: strike: 138°   dip: 86°   rake: -171° Quality: azimuthalGap: -1°   stationPolarityCount: 141   misfitWeightCount: 19.2   misfit: 0.22   stationDistributionRatio: 0.33   meanDistP: 48.0   meanDistT: 33.0   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 158°   dip: 61°   rake: 176° Nodal Plane 2: strike: 249°   dip: 87°   rake: 29° Quality: azimuthalGap: 42°   stationPolarityCount: 141   misfit: 0.41   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 44.86   fracAcc30degPref: 0.50   qualityCode: D 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: 23°   dip: 57°   rake: 28° Nodal Plane 2: strike: 277°   dip: 67°   rake: 144° Quality: azimuthalGap: -1°   stationPolarityCount: 29   misfitWeightCount: 6.2   misfit: 9999.90   stationDistributionRatio: 0.52   meanDistP: 29.8   meanDistT: 30.1   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: 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

Event ID: smi:KOERI/ee/event/1737931155432
Event info last updated: 2025.01.26-23:39:47 UTC
Event first association/location: 2025.01.26-22:44:11 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI