Early-est:     Off East Coast of Kamchatka    2025.07.31-17:52:55.70    q:A      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:0.5     fmamp_polarity:./hypo.1753984375052.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1753984375052.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1753984375052.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: 5.0* [57]    Mwp: 5.6X [1]    Mwpd: 5.6Xinv [1]
Region: Off East Coast of Kamchatka
Origin Time: 2025.07.31-17:52:55.70 UTC
Hypocenter: lat: 51.66°  lon: 159.40°  [+/-13km]    depth: 15km  [+/-12km]
Location Quality: qualityCode:  A     stdErr: 1.5s   assocPhases: 96   usedPhases: 61
minDist: 1.4°   maxDist: 129.2°   AzGap: 103°   2ndAzGap: 113°   atten: -0.83 [+/-0.29]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 144°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 324°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 54°   intermediateAxisPlunge: 0°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [38]    Td: 1.3s [4]    Td*T50Ex: 0.5 [4]    To: 3.9s [36]
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:
   0.5
   0.5
   0.5
Td*To:
     5.1
     5.1
     5.1
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1753984375052.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 123°   dip: 62°   rake: -3°
Nodal Plane 2: strike: 214°   dip: 88°   rake: -151°
Quality: azimuthalGap: -1°   stationPolarityCount: 50   misfitWeightCount: 6.8   misfit: 0.07   stationDistributionRatio: 0.43   meanDistP: 48.3   meanDistT: 39.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1753984375052.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.1753984375052.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 164°   stationPolarityCount: 50   misfit: 0.99   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 48.39   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1753984375052.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1753984375052
Event info last updated: 2025.07.31-18:51:01 UTC
Event first association/location: 2025.07.31-18:03:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA