Early-est:     Off East Coast of Kamchatka    2025.08.03-14:26:49.64    q:A      mb:5.4    Mwp:5.9*    Mwpd:-    Td*T50Ex:1.5     fmamp_polarity:./hypo.1754231207663.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754231207663.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754231207663.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: 5.4 [132]    Mwp: 5.9* [60]    Mwpd: 6.2Xinv [61]
Region: Off East Coast of Kamchatka
Origin Time: 2025.08.03-14:26:49.64 UTC
Hypocenter: lat: 52.47°  lon: 160.64°  [+/-14km]    depth: 18km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 214   usedPhases: 135
minDist: 1.3°   maxDist: 147.3°   AzGap: 78°   2ndAzGap: 86°   atten: -0.86 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 14km   azMaxHorUnc: 158°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 337°   majorAxisPlunge: 15°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 243°   intermediateAxisPlunge: 17°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [131]    Td: 2.8s [17]    Td*T50Ex: 1.5 [17]    To: 27.9s [129]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~40km
   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 (40km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.5
   1.5
   1.5
Td*To:
     78.1
     78.1
     78.1
Mwp magnitude:
       5.9*
       5.9*
       5.9*
Hypocenter depth:
       18km
       18km
       18km
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.1754231207663.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 79°   dip: 39°   rake: -102°
Nodal Plane 2: strike: 274°   dip: 52°   rake: -81°
Quality: azimuthalGap: -1°   stationPolarityCount: 116   misfitWeightCount: 17.3   misfit: 0.11   stationDistributionRatio: 0.69   meanDistP: 24.5   meanDistT: 29.2   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754231207663.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 54°   dip: 34°   rake: -102°
Nodal Plane 2: strike: 249°   dip: 57°   rake: -82°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 4.4   misfit: 0.00   stationDistributionRatio: 0.56   meanDistP: 45.0   meanDistT: 42.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1754231207663.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 253°   dip: 38°   rake: -81°
Nodal Plane 2: strike: 62°   dip: 53°   rake: -97°
Quality: azimuthalGap: 113°   stationPolarityCount: 116   misfit: 0.21   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 35.99   fracAcc30degPref: 0.56   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754231207663.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754231207663
Event info last updated: 2025.08.03-15:25:02 UTC
Event first association/location: 2025.08.03-14:32:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA