Early-est:     Kuril Islands    2025.08.04-06:48:34.72    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754290112232.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754290112232.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754290112232.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: 5.0* [47]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2025.08.04-06:48:34.72 UTC
Hypocenter: lat: 49.52°  lon: 156.97°  [+/-18km]    depth: 15km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 77   usedPhases: 55
minDist: 3.7°   maxDist: 150.0°   AzGap: 73°   2ndAzGap: 84°   atten: -0.95 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 18km   azMaxHorUnc: 130°
68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 310°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 211°   intermediateAxisPlunge: 61°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [35]    Td: -s [0]    Td*T50Ex: - [0]    To: 13.3s [33]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~60km
   North America / Pacific [subduction zone]: distance: ~790km
   Okhotsk / North America [subduction zone]: distance: ~790km
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 (60km)
 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.1754290112232.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 85°   dip: 51°   rake: -168°
Nodal Plane 2: strike: 348°   dip: 81°   rake: -40°
Quality: azimuthalGap: -1°   stationPolarityCount: 48   misfitWeightCount: 9.6   misfit: 0.21   stationDistributionRatio: 0.38   meanDistP: 48.9   meanDistT: 50.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754290112232.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.1754290112232.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 227°   dip: 73°   rake: 162°
Nodal Plane 2: strike: 322°   dip: 73°   rake: 17°
Quality: azimuthalGap: 100°   stationPolarityCount: 48   misfit: 0.34   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 11.28   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754290112232.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754290112232
Event info last updated: 2025.08.04-07:47:00 UTC
Event first association/location: 2025.08.04-06:54:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA