Early-est:     Near East Coast of Kamchatka    2025.08.04-21:06:21.31    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754341581111.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754341581111.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754341581111.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: 4.8* [33]    Mwp: 5.0X [2]    Mwpd: 5.4Xinv [1]
Region: Near East Coast of Kamchatka
Origin Time: 2025.08.04-21:06:21.31 UTC
Hypocenter: lat: 51.04°  lon: 157.94°  [+/-25km]    depth: 15km  [+/-24km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 67   usedPhases: 42
minDist: 2.0°   maxDist: 145.4°   AzGap: 111°   2ndAzGap: 115°   atten: -1.34 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 25km   azMaxHorUnc: 116°
68%ConfEllipsoid:   semiMajorAxisLength: 32km   majorAxisAzimuth: 293°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 25km   intermediateAxisAzimuth: 188°   intermediateAxisPlunge: 42°   semiMinorAxisLength: 21km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [26]    Td: 1.3Xs [2]    Td*T50Ex: - [0]    To: 2.3s [22]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~130km
   North America / Pacific [subduction zone]: distance: ~620km
   Okhotsk / North America [subduction zone]: distance: ~620km
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 (130km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
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.1754341581111.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 90°   dip: 21°   rake: 91°
Nodal Plane 2: strike: 269°   dip: 69°   rake: 90°
Quality: azimuthalGap: -1°   stationPolarityCount: 38   misfitWeightCount: 8.7   misfit: 0.17   stationDistributionRatio: 0.35   meanDistP: 43.9   meanDistT: 47.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754341581111.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.1754341581111.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 155°   dip: 65°   rake: 154°
Nodal Plane 2: strike: 257°   dip: 66°   rake: 27°
Quality: azimuthalGap: 139°   stationPolarityCount: 38   misfit: 0.27   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 20.17   fracAcc30degPref: 0.92   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754341581111.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754341581111
Event info last updated: 2025.08.04-22:05:02 UTC
Event first association/location: 2025.08.04-21:13:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA