Early-est:     Southern Alaska    2026.02.10-20:42:21.89    q:C      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770756139216.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770756139216.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770756139216.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: 4.8* [34]    Mwp: - [0]    Mwpd: 6.3Xinv [1]
Region: Southern Alaska
Origin Time: 2026.02.10-20:42:21.89 UTC
Hypocenter: lat: 61.70°  lon: -149.70°  [+/-32km]    depth: 30km  [+/-32km]
Location Quality: qualityCode:  C     stdErr: 1.0s   assocPhases: 100   usedPhases: 39
minDist: 3.3°   maxDist: 146.7°   AzGap: 70°   2ndAzGap: 82°   atten: -0.78 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 32km   azMaxHorUnc: 59°
68%ConfEllipsoid:   semiMajorAxisLength: 39km   majorAxisAzimuth: 239°   majorAxisPlunge: 2°   semiIntermediateAxisLength: 32km   intermediateAxisAzimuth: 340°   intermediateAxisPlunge: 81°   semiMinorAxisLength: 28km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [15]    Td: 7.8Xs [1]    Td*T50Ex: - [0]    To: 2.3s [13]
Closest plate boundaries:
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?:
 no
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       30km
       30km
       30km
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.1770756139216.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 135°   dip: 7°   rake: -180°
Nodal Plane 2: strike: 45°   dip: 90°   rake: -83°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 5.7   misfit: 0.06   stationDistributionRatio: 0.63   meanDistP: 34.3   meanDistT: 45.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770756139216.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.1770756139216.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 200°   dip: 78°   rake: 137°
Nodal Plane 2: strike: 302°   dip: 48°   rake: 17°
Quality: azimuthalGap: 82°   stationPolarityCount: 30   misfit: 0.27   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 28.23   fracAcc30degPref: 0.67   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770756139216.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770756139216
Event info last updated: 2026.02.10-21:41:04 UTC
Event first association/location: 2026.02.10-20:51:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA