Early-est:     Off East Coast of Kamchatka    2025.08.03-18:07:35.91    q:A      mb:5.3    Mwp:5.9*    Mwpd:-    Td*T50Ex:1.2     fmamp_polarity:./hypo.1754244458993.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754244458993.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754244458993.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: 5.3 [134]    Mwp: 5.9* [56]    Mwpd: 6.0Xinv [56]
Region: Off East Coast of Kamchatka
Origin Time: 2025.08.03-18:07:35.91 UTC
Hypocenter: lat: 52.42°  lon: 160.83°  [+/-12km]    depth: 9km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.5s   assocPhases: 217   usedPhases: 143
minDist: 1.5°   maxDist: 147.2°   AzGap: 78°   2ndAzGap: 86°   atten: -1.06 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 12km   azMaxHorUnc: 129°
68%ConfEllipsoid:   semiMajorAxisLength: 15km   majorAxisAzimuth: 203°   majorAxisPlunge: 45°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 298°   intermediateAxisPlunge: 6°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [119]    Td: 2.3s [20]    Td*T50Ex: 1.2 [20]    To: 32.3s [115]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~30km
   North America / Pacific [subduction zone]: distance: ~380km
   Okhotsk / North America [subduction zone]: distance: ~380km
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 (30km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.2
   1.2
   1.2
Td*To:
     74.3
     74.3
     74.3
Mwp magnitude:
       5.9*
       5.9*
       5.9*
Hypocenter depth:
       9km
       9km
       9km
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.1754244458993.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 69°   dip: 55°   rake: 8°
Nodal Plane 2: strike: 335°   dip: 84°   rake: 145°
Quality: azimuthalGap: -1°   stationPolarityCount: 124   misfitWeightCount: 16.4   misfit: 0.06   stationDistributionRatio: 0.64   meanDistP: 32.7   meanDistT: 30.9   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754244458993.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 86°   dip: 16°   rake: 22°
Nodal Plane 2: strike: 335°   dip: 84°   rake: 105°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 5.5   misfit: 0.00   stationDistributionRatio: 0.71   meanDistP: 36.6   meanDistT: 36.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1754244458993.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 102°   dip: 22°   rake: 25°
Nodal Plane 2: strike: 349°   dip: 81°   rake: 110°
Quality: azimuthalGap: 109°   stationPolarityCount: 124   misfit: 0.19   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 30.26   fracAcc30degPref: 0.65   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754244458993.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754244458993
Event info last updated: 2025.08.03-19:06:01 UTC
Event first association/location: 2025.08.03-18:14:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA