Early-est:     South of Alaska    2026.08.11-08:49:25.37    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786438164373.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786438164373.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786438164373.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: 5.0* [25]    Mwp: - [0]    Mwpd: - [0]
Region: South of Alaska
Origin Time: 2026.08.11-08:49:25.37 UTC
Hypocenter: lat: 54.70°  lon: -160.00°  [+/-31km]    depth: 15km  [+/-32km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 50   usedPhases: 26
minDist: 5.1°   maxDist: 88.8°   AzGap: 139°   2ndAzGap: 153°   atten: -1.18 [+/-0.34]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 27km   maxHorUnc: 31km   azMaxHorUnc: 9°
68%ConfEllipsoid:   semiMajorAxisLength: 41km   majorAxisAzimuth: 12°   majorAxisPlunge: 28°   semiIntermediateAxisLength: 33km   intermediateAxisAzimuth: 105°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 29km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [18]    Td: 0.9Xs [2]    Td*T50Ex: - [0]    To: 8.9s [15]
Closest plate boundaries:
   North America / Pacific [subduction zone]: distance: ~100km
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 (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1786438164373.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 159°   dip: 15°   rake: -110°
Nodal Plane 2: strike: 360°   dip: 76°   rake: -85°
Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 5.1   misfit: 0.08   stationDistributionRatio: 0.39   meanDistP: 48.3   meanDistT: 52.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786438164373.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.1786438164373.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 133°   dip: 81°   rake: -160°
Nodal Plane 2: strike: 40°   dip: 71°   rake: -10°
Quality: azimuthalGap: 138°   stationPolarityCount: 22   misfit: 0.21   stationDistributionRatio: 0.47   rmsAngDiffAccPref: 38.44   fracAcc30degPref: 0.74   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786438164373.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786438164373
Event info last updated: 2026.08.11-09:48:01 UTC
Event first association/location: 2026.08.11-08:57:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA