Early-est:     Kuril Islands    2025.08.03-21:55:12.37    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754258116822.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754258116822.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754258116822.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: 5.1* [76]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2025.08.03-21:55:12.37 UTC
Hypocenter: lat: 49.30°  lon: 155.47°  [+/-27km]    depth: 15km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 121   usedPhases: 92
minDist: 11.2°   maxDist: 155.5°   AzGap: 95°   2ndAzGap: 104°   atten: -0.90 [+/-0.27]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 27km   azMaxHorUnc: 22°
68%ConfEllipsoid:   semiMajorAxisLength: 34km   majorAxisAzimuth: 202°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 109°   intermediateAxisPlunge: 62°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [57]    Td: 2.1Xs [1]    Td*T50Ex: - [0]    To: 1.6s [53]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~130km
   North America / Pacific [subduction zone]: distance: ~880km
   Okhotsk / North America [subduction zone]: distance: ~880km
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.1754258116822.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 79°   dip: 33°   rake: -144°
Nodal Plane 2: strike: 317°   dip: 71°   rake: -63°
Quality: azimuthalGap: -1°   stationPolarityCount: 67   misfitWeightCount: 8.6   misfit: 0.09   stationDistributionRatio: 0.42   meanDistP: 37.2   meanDistT: 47.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754258116822.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.1754258116822.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 347°   dip: 75°   rake: 179°
Nodal Plane 2: strike: 77°   dip: 89°   rake: 15°
Quality: azimuthalGap: 130°   stationPolarityCount: 67   misfit: 0.40   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 28.26   fracAcc30degPref: 0.76   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754258116822.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754258116822
Event info last updated: 2025.08.03-22:54:02 UTC
Event first association/location: 2025.08.03-22:05:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA