Early-est:     Southern Alaska    2026.03.31-15:44:27.91    q:C      mb:-    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

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

Earthquake Details: Magnitude: mb: 5.5X [3]    Mwp: - [0]    Mwpd: - [0] Region: Southern Alaska Origin Time: 2026.03.31-15:44:27.91 UTC Hypocenter: lat: 59.76°  lon: -152.29°  [+/-15km]    depth: 15km  [+/-68km] Location Quality: qualityCode:  C     stdErr: 0.5s   assocPhases: 8   usedPhases: 5 minDist: 2.0°   maxDist: 9.3°   AzGap: 195°   2ndAzGap: 214°   atten: -9.90 [+/-0.00] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 108° 68%ConfEllipsoid:   semiMajorAxisLength: 68km   majorAxisAzimuth: 127°   majorAxisPlunge: 87°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 286°   intermediateAxisPlunge: 3°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0X [2]    Td: 0.2Xs [2]    Td*T50Ex: - [0]    To: 1.3Xs [2] Closest plate boundaries:    North America / Pacific [subduction zone]: distance: ~350km 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:  >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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (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
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
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 0°   stationPolarityCount: 3   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: F Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1774971869303
Event info last updated: 2026.03.31-16:43:00 UTC
Event first association/location: 2026.03.31-15:54:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA