Early-est:     Near East Coast of Kamchatka    2025.08.01-13:44:20.43    q:B      mb:5.3*    Mwp:-    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1754055861701.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754055861701.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754055861701.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* [128]    Mwp: 5.8X [3]    Mwpd: 6.2Xinv [1]
Region: Near East Coast of Kamchatka
Origin Time: 2025.08.01-13:44:20.43 UTC
Hypocenter: lat: 51.91°  lon: 158.47°  [+/-22km]    depth: 62km  [+/-43km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 209   usedPhases: 148
minDist: 1.1°   maxDist: 158.6°   AzGap: 60°   2ndAzGap: 67°   atten: -0.89 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 22km   azMaxHorUnc: 2°
68%ConfEllipsoid:   semiMajorAxisLength: 46km   majorAxisAzimuth: 335°   majorAxisPlunge: 67°   semiIntermediateAxisLength: 24km   intermediateAxisAzimuth: 205°   intermediateAxisPlunge: 15°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [99]    Td: 2.5s [10]    Td*T50Ex: 1.1 [10]    To: 7.4s [96]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~150km
   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 (150km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     18.5
     18.5
     18.5
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       62km
       62km
       62km
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.1754055861701.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 213°   dip: 25°   rake: 91°
Nodal Plane 2: strike: 32°   dip: 65°   rake: 90°
Quality: azimuthalGap: -1°   stationPolarityCount: 114   misfitWeightCount: 18.5   misfit: 0.16   stationDistributionRatio: 0.64   meanDistP: 31.9   meanDistT: 23.1   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754055861701.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.1754055861701.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 245°   dip: 29°   rake: 88°
Nodal Plane 2: strike: 68°   dip: 61°   rake: 91°
Quality: azimuthalGap: 101°   stationPolarityCount: 114   misfit: 0.24   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 38.49   fracAcc30degPref: 0.48   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754055861701.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754055861701
Event info last updated: 2025.08.01-14:43:02 UTC
Event first association/location: 2025.08.01-13:50:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA