Early-est:     Off East Coast of Kamchatka    2025.07.31-16:41:02.67    q:A      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:0.5     fmamp_polarity:./hypo.1753980066438.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1753980066438.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1753980066438.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* [60]    Mwp: 5.4X [2]    Mwpd: 6.0Xinv [2]
Region: Off East Coast of Kamchatka
Origin Time: 2025.07.31-16:41:02.67 UTC
Hypocenter: lat: 51.63°  lon: 159.10°  [+/-12km]    depth: 12km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.9s   assocPhases: 104   usedPhases: 67
minDist: 1.4°   maxDist: 170.3°   AzGap: 96°   2ndAzGap: 140°   atten: -1.14 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 12km   azMaxHorUnc: 136°
68%ConfEllipsoid:   semiMajorAxisLength: 15km   majorAxisAzimuth: 137°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 270°   intermediateAxisPlunge: 76°   semiMinorAxisLength: 11km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [42]    Td: 1.5s [5]    Td*T50Ex: 0.5 [5]    To: 3.8s [39]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~100km
   North America / Pacific [subduction zone]: distance: ~520km
   Okhotsk / North America [subduction zone]: distance: ~520km
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 (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.5
   0.5
   0.5
Td*To:
     5.7
     5.7
     5.7
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       12km
       12km
       12km
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.1753980066438.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 357°   dip: 38°   rake: 127°
Nodal Plane 2: strike: 133°   dip: 60°   rake: 65°
Quality: azimuthalGap: -1°   stationPolarityCount: 58   misfitWeightCount: 8.3   misfit: 0.16   stationDistributionRatio: 0.44   meanDistP: 48.8   meanDistT: 42.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1753980066438.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.1753980066438.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 321°   dip: 37°   rake: 103°
Nodal Plane 2: strike: 124°   dip: 54°   rake: 80°
Quality: azimuthalGap: 139°   stationPolarityCount: 58   misfit: 0.34   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 35.97   fracAcc30degPref: 0.50   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1753980066438.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1753980066438
Event info last updated: 2025.07.31-17:40:01 UTC
Event first association/location: 2025.07.31-16:47:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA