Early-est:     Off East Coast of Kamchatka    2025.08.03-15:12:08.31    q:C      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754233926931.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754233926931.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754233926931.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: 4.6* [17]    Mwp: - [0]    Mwpd: - [0]
Region: Off East Coast of Kamchatka
Origin Time: 2025.08.03-15:12:08.31 UTC
Hypocenter: lat: 51.49°  lon: 161.02°  [+/-17km]    depth: 9km  [+/-26km]
Location Quality: qualityCode:  C     stdErr: 1.6s   assocPhases: 42   usedPhases: 23
minDist: 2.1°   maxDist: 139.1°   AzGap: 152°   2ndAzGap: 179°   atten: -0.62 [+/-0.81]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 17km   azMaxHorUnc: 18°
68%ConfEllipsoid:   semiMajorAxisLength: 29km   majorAxisAzimuth: 239°   majorAxisPlunge: 57°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 343°   intermediateAxisPlunge: 8°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 4.2s [6]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~30km
   North America / Pacific [subduction zone]: distance: ~460km
   Okhotsk / North America [subduction zone]: distance: ~460km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       9km
       9km
       9km
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.1754233926931.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 274°   dip: 49°   rake: 42°
Nodal Plane 2: strike: 153°   dip: 59°   rake: 131°
Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 4.0   misfit: 0.05   stationDistributionRatio: 0.42   meanDistP: 54.6   meanDistT: 53.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754233926931.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.1754233926931.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: 178°   stationPolarityCount: 20   misfit: 0.99   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 25.83   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754233926931.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754233926931
Event info last updated: 2025.08.03-16:11:01 UTC
Event first association/location: 2025.08.03-15:19:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA