Early-est:     Off East Coast of Kamchatka    2025.08.01-11:57:25.70    q:A      mb:5.4    Mwp:6.2*    Mwpd:-    Td*T50Ex:2.5     fmamp_polarity:./hypo.1754049451062.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754049451062.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754049451062.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 [109]    Mwp: 6.2* [60]    Mwpd: 6.4Xinv [58]
Region: Off East Coast of Kamchatka
Origin Time: 2025.08.01-11:57:25.70 UTC
Hypocenter: lat: 51.77°  lon: 159.78°  [+/-15km]    depth: 15km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 211   usedPhases: 115
minDist: 1.4°   maxDist: 148.0°   AzGap: 106°   2ndAzGap: 108°   atten: -0.71 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 16°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 16°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 285°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [114]    Td: 4.3s [17]    Td*T50Ex: 2.5 [17]    To: 33.0s [112]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~60km
   North America / Pacific [subduction zone]: distance: ~480km
   Okhotsk / North America [subduction zone]: distance: ~480km
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 (60km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   2.5
   2.5
   2.5
Td*To:
     141.9
     141.9
     141.9
Mwp magnitude:
       6.2*
       6.2*
       6.2*
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.1754049451062.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 190°   dip: 18°   rake: 69°
Nodal Plane 2: strike: 33°   dip: 73°   rake: 97°
Quality: azimuthalGap: -1°   stationPolarityCount: 98   misfitWeightCount: 11.0   misfit: 0.08   stationDistributionRatio: 0.53   meanDistP: 43.9   meanDistT: 28.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754049451062.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 178°   dip: 23°   rake: 61°
Nodal Plane 2: strike: 30°   dip: 70°   rake: 102°
Quality: azimuthalGap: -1°   stationPolarityCount: 23   misfitWeightCount: 3.6   misfit: 0.00   stationDistributionRatio: 0.52   meanDistP: 48.8   meanDistT: 41.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1754049451062.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 18°   dip: 83°   rake: 108°
Nodal Plane 2: strike: 129°   dip: 19°   rake: 23°
Quality: azimuthalGap: 119°   stationPolarityCount: 98   misfit: 0.11   stationDistributionRatio: 0.70   rmsAngDiffAccPref: 32.24   fracAcc30degPref: 0.63   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754049451062.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754049451062
Event info last updated: 2025.08.01-12:56:02 UTC
Event first association/location: 2025.08.01-12:03:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA