Early-est:     Near East Coast of Kamchatka    2025.08.04-00:44:27.22    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:0.5     fmamp_polarity:./hypo.1754268262741.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754268262741.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754268262741.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: 5.1* [105]    Mwp: 5.1X [2]    Mwpd: - [0]
Region: Near East Coast of Kamchatka
Origin Time: 2025.08.04-00:44:27.22 UTC
Hypocenter: lat: 51.83°  lon: 158.35°  [+/-21km]    depth: 68km  [+/-39km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 163   usedPhases: 132
minDist: 1.2°   maxDist: 158.5°   AzGap: 78°   2ndAzGap: 87°   atten: -0.88 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 21km   azMaxHorUnc: 164°
68%ConfEllipsoid:   semiMajorAxisLength: 42km   majorAxisAzimuth: 347°   majorAxisPlunge: 64°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 158°   intermediateAxisPlunge: 26°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [81]    Td: 1.2s [4]    Td*T50Ex: 0.5 [4]    To: 2.1s [78]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~150km
   North America / Pacific [subduction zone]: distance: ~530km
   Okhotsk / North America [subduction zone]: distance: ~530km
Subduction geometry:    Zone: Kamchatka/Kurils/Japan: 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 (150km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.5
   0.5
   0.5
Td*To:
     2.5
     2.5
     2.5
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       68km
       68km
       68km
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.1754268262741.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 108°   dip: 74°   rake: 165°
Nodal Plane 2: strike: 202°   dip: 76°   rake: 16°
Quality: azimuthalGap: -1°   stationPolarityCount: 99   misfitWeightCount: 20.0   misfit: 0.20   stationDistributionRatio: 0.49   meanDistP: 24.7   meanDistT: 25.8   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754268262741.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.1754268262741.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 106°   dip: 87°   rake: 161°
Nodal Plane 2: strike: 197°   dip: 71°   rake: 3°
Quality: azimuthalGap: 110°   stationPolarityCount: 100   misfit: 0.29   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 13.08   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754268262741.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754268262741
Event info last updated: 2025.08.04-01:43:01 UTC
Event first association/location: 2025.08.04-00:50:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA