Early-est:     Andreanof Islands, Aleutian Is.    2025.08.05-11:04:10.18    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754391851343.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754391851343.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754391851343.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: 4.9* [41]    Mwp: - [0]    Mwpd: - [0]
Region: Andreanof Islands, Aleutian Is.
Origin Time: 2025.08.05-11:04:10.18 UTC
Hypocenter: lat: 51.79°  lon: -177.32°  [+/-13km]    depth: 80km  [+/-13km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 88   usedPhases: 52
minDist: 2.0°   maxDist: 151.4°   AzGap: 89°   2ndAzGap: 133°   atten: -1.19 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 13km   azMaxHorUnc: 3°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 3°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 126°   intermediateAxisPlunge: 83°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 80%
T50Ex: 0.4 [27]    Td: 1.5Xs [2]    Td*T50Ex: - [0]    To: 2.2s [25]
Closest plate boundaries:
   North America / Pacific [subduction zone]: distance: ~140km
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 (140km)
 no
 no
Prob underwater:
 80%
 80%
 80%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       80km
       80km
       80km
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.1754391851343.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 132°   dip: 23°   rake: -27°
Nodal Plane 2: strike: 248°   dip: 80°   rake: -110°
Quality: azimuthalGap: -1°   stationPolarityCount: 42   misfitWeightCount: 7.8   misfit: 0.18   stationDistributionRatio: 0.48   meanDistP: 51.0   meanDistT: 53.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754391851343.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.1754391851343.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 155°   dip: 33°   rake: -12°
Nodal Plane 2: strike: 254°   dip: 84°   rake: -122°
Quality: azimuthalGap: 146°   stationPolarityCount: 42   misfit: 0.35   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 35.83   fracAcc30degPref: 0.53   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754391851343.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754391851343
Event info last updated: 2025.08.05-12:03:02 UTC
Event first association/location: 2025.08.05-11:14:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA