Early-est:     Near East Coast of Kamchatka    2025.07.31-01:28:01.60    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1753925281277.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1753925281277.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1753925281277.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* [39]    Mwp: - [0]    Mwpd: - [0]
Region: Near East Coast of Kamchatka
Origin Time: 2025.07.31-01:28:01.60 UTC
Hypocenter: lat: 51.01°  lon: 158.65°  [+/-13km]    depth: 15km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 82   usedPhases: 47
minDist: 2.0°   maxDist: 148.8°   AzGap: 108°   2ndAzGap: 119°   atten: -1.06 [+/-0.35]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 13km   azMaxHorUnc: 163°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 342°   majorAxisPlunge: 8°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 251°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [19]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.0s [13]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~90km
   North America / Pacific [subduction zone]: distance: ~590km
   Okhotsk / North America [subduction zone]: distance: ~590km
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 (90km)
 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.1753925281277.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 19°   dip: 47°   rake: 65°
Nodal Plane 2: strike: 234°   dip: 49°   rake: 114°
Quality: azimuthalGap: -1°   stationPolarityCount: 40   misfitWeightCount: 5.3   misfit: 0.18   stationDistributionRatio: 0.41   meanDistP: 53.7   meanDistT: 54.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1753925281277.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.1753925281277.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 76°   dip: 83°   rake: 177°
Nodal Plane 2: strike: 166°   dip: 87°   rake: 7°
Quality: azimuthalGap: 146°   stationPolarityCount: 40   misfit: 0.32   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 42.15   fracAcc30degPref: 0.62   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1753925281277.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1753925281277
Event info last updated: 2025.07.31-02:16:00 UTC
Event first association/location: 2025.07.31-01:40:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA