Early-est:     Andreanof Islands, Aleutian Is.    2026.02.10-23:09:15.79    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770764951361.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770764951361.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770764951361.mech.hash.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 4.7* [42]    Mwp: - [0]    Mwpd: - [0]
Region: Andreanof Islands, Aleutian Is.
Origin Time: 2026.02.10-23:09:15.79 UTC
Hypocenter: lat: 52.47°  lon: -175.88°  [+/-13km]    depth: 196km  [+/-21km]
Location Quality: qualityCode:  B     stdErr: 0.7s   assocPhases: 70   usedPhases: 39
minDist: 14.3°   maxDist: 151.5°   AzGap: 132°   2ndAzGap: 134°   atten: -1.71 [+/-0.39]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 13km   azMaxHorUnc: 168°
68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 220°   majorAxisPlunge: 85°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 347°   intermediateAxisPlunge: 3°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [26]    Td: 1.2Xs [1]    Td*T50Ex: - [0]    To: 1.3s [26]
Closest plate boundaries:
   North America / Pacific [subduction zone]: distance: ~190km
Subduction geometry:    Zone: Alaska-Aleutians: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (190km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       196km
       196km
       196km
Slab depth at epicenter:
       n/a
       -
       -
Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)
./hypo.1770764951361.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 103°   dip: 28°   rake: 132°
Nodal Plane 2: strike: 238°   dip: 70°   rake: 71°
Quality: azimuthalGap: -1°   stationPolarityCount: 40   misfitWeightCount: 8.4   misfit: 0.15   stationDistributionRatio: 0.42   meanDistP: 40.3   meanDistT: 46.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770764951361.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
./hypo.1770764951361.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 108°   dip: 31°   rake: 137°
Nodal Plane 2: strike: 236°   dip: 70°   rake: 66°
Quality: azimuthalGap: 131°   stationPolarityCount: 40   misfit: 0.23   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 32.81   fracAcc30degPref: 0.61   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770764951361.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770764951361
Event info last updated: 2026.02.11-00:08:01 UTC
Event first association/location: 2026.02.10-23:17:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA