Early-est:     Near East Coast of Kamchatka    2025.07.31-21:12:48.52    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1753996369074.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1753996369074.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1753996369074.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: 4.7* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Near East Coast of Kamchatka
Origin Time: 2025.07.31-21:12:48.52 UTC
Hypocenter: lat: 51.29°  lon: 157.93°  [+/-17km]    depth: 61km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 57   usedPhases: 25
minDist: 1.8°   maxDist: 145.4°   AzGap: 115°   2ndAzGap: 139°   atten: -0.75 [+/-0.49]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 17km   azMaxHorUnc: 128°
68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 306°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 168°   intermediateAxisPlunge: 69°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [17]    Td: -s [0]    Td*T50Ex: - [0]    To: 31.5s [16]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~140km
   North America / Pacific [subduction zone]: distance: ~600km
   Okhotsk / North America [subduction zone]: distance: ~600km
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 (140km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       61km
       61km
       61km
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.1753996369074.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 13°   dip: 46°   rake: -125°
Nodal Plane 2: strike: 238°   dip: 54°   rake: -59°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 8.4   misfit: 0.04   stationDistributionRatio: 0.51   meanDistP: 47.5   meanDistT: 34.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1753996369074.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.1753996369074.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 229°   dip: 42°   rake: -83°
Nodal Plane 2: strike: 40°   dip: 49°   rake: -97°
Quality: azimuthalGap: 126°   stationPolarityCount: 24   misfit: 0.19   stationDistributionRatio: 0.75   rmsAngDiffAccPref: 25.55   fracAcc30degPref: 0.90   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1753996369074.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1753996369074
Event info last updated: 2025.07.31-22:11:01 UTC
Event first association/location: 2025.07.31-21:23:04 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA