Early-est:     Off East Coast of Kamchatka    2025.07.31-18:41:02.22    q:C      mb:5.3*    Mwp:-    Mwpd:-    Td*T50Ex:0.3     fmamp_polarity:./hypo.1753987268262.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1753987268262.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1753987268262.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* [92]    Mwp: 4.8X [1]    Mwpd: - [0]
Region: Off East Coast of Kamchatka
Origin Time: 2025.07.31-18:41:02.22 UTC
Hypocenter: lat: 51.57°  lon: 159.51°  [+/-53km]    depth: 30km  [+/-34km]
Location Quality: qualityCode:  C     stdErr: 1.7s   assocPhases: 161   usedPhases: 88
minDist: 1.5°   maxDist: 158.4°   AzGap: 86°   2ndAzGap: 103°   atten: -0.29 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 27km   maxHorUnc: 53km   azMaxHorUnc: 146°
68%ConfEllipsoid:   semiMajorAxisLength: 66km   majorAxisAzimuth: 146°   majorAxisPlunge: 0°   semiIntermediateAxisLength: 35km   intermediateAxisAzimuth: 237°   intermediateAxisPlunge: 52°   semiMinorAxisLength: 32km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [97]    Td: 1.0s [7]    Td*T50Ex: 0.3 [7]    To: 12.3s [95]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~80km
   North America / Pacific [subduction zone]: distance: ~500km
   Okhotsk / North America [subduction zone]: distance: ~500km
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 (80km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.3
   0.3
   0.3
Td*To:
     12.3
     12.3
     12.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       30km
       30km
       30km
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.1753987268262.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 109°   dip: 41°   rake: -92°
Nodal Plane 2: strike: 292°   dip: 49°   rake: -88°
Quality: azimuthalGap: -1°   stationPolarityCount: 99   misfitWeightCount: 11.4   misfit: 0.27   stationDistributionRatio: 0.66   meanDistP: 52.0   meanDistT: 54.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1753987268262.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.1753987268262.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 118°   dip: 34°   rake: -15°
Nodal Plane 2: strike: 221°   dip: 82°   rake: -123°
Quality: azimuthalGap: 139°   stationPolarityCount: 100   misfit: 0.37   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 39.04   fracAcc30degPref: 0.51   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1753987268262.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1753987268262
Event info last updated: 2025.07.31-19:40:02 UTC
Event first association/location: 2025.07.31-18:49:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA