Early-est:     Southern Alaska    2024.12.20-04:03:22.75    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1734667402484.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1734667402484.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1734667402484.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* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Southern Alaska
Origin Time: 2024.12.20-04:03:22.75 UTC
Hypocenter: lat: 60.38°  lon: -152.07°  [+/-10km]    depth: 62km  [+/-29km]
Location Quality: qualityCode:  B     stdErr: 0.6s   assocPhases: 41   usedPhases: 9
minDist: 1.9°   maxDist: 148.2°   AzGap: 74°   2ndAzGap: 113°   atten: -2.28 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 10km   azMaxHorUnc: 60°
68%ConfEllipsoid:   semiMajorAxisLength: 29km   majorAxisAzimuth: 104°   majorAxisPlunge: 88°   semiIntermediateAxisLength: 12km   intermediateAxisAzimuth: 239°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 11km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 99%
T50Ex: 0.4 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.2s [7]
Closest plate boundaries:
   North America / Pacific [subduction zone]: distance: ~370km
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:
       62km
       62km
       62km
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.1734667402484.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 135°   dip: 46°   rake: -139°
Nodal Plane 2: strike: 15°   dip: 62°   rake: -52°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 7.5   misfit: 0.01   stationDistributionRatio: 0.49   meanDistP: 34.1   meanDistT: 40.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1734667402484.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.1734667402484.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 127°   dip: 54°   rake: -158°
Nodal Plane 2: strike: 24°   dip: 72°   rake: -38°
Quality: azimuthalGap: 97°   stationPolarityCount: 17   misfit: 0.22   stationDistributionRatio: 0.57   rmsAngDiffAccPref: 36.58   fracAcc30degPref: 0.58   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1734667402484.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1734667402484
Event info last updated: 2024.12.20-05:02:01 UTC
Event first association/location: 2024.12.20-04:06:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA