Early-est:     East of Kuril Islands    2025.08.03-12:38:20.92    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:     fmamp_polarity_waveform:     hash:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.1* [58]    Mwp: 5.5X [1]    Mwpd: 5.8Xinv [1] Region: East of Kuril Islands Origin Time: 2025.08.03-12:38:20.92 UTC Hypocenter: lat: 50.48°  lon: 158.99°  [+/-30km]    depth: 9km  [+/-39km] Location Quality: qualityCode:  B     stdErr: 1.9s   assocPhases: 87   usedPhases: 63 minDist: 2.6°   maxDist: 148.6°   AzGap: 114°   2ndAzGap: 125°   atten: -1.13 [+/-0.32] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 30km   azMaxHorUnc: 152° 68%ConfEllipsoid:   semiMajorAxisLength: 40km   majorAxisAzimuth: 338°   majorAxisPlunge: 76°   semiIntermediateAxisLength: 36km   intermediateAxisAzimuth: 152°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 23km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [52]    Td: 1.5s [5]    Td*T50Ex: 0.7 [5]    To: 29.0s [45] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~40km    North America / Pacific [subduction zone]: distance: ~630km    Okhotsk / North America [subduction zone]: distance: ~630km 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 (40km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    0.7    0.7    0.7 Td*To:      43.5      43.5      43.5 Mwp magnitude:        -        -        - Hypocenter depth:        9km        9km        9km 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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 144°   dip: 38°   rake: -130° Nodal Plane 2: strike: 11°   dip: 62°   rake: -63° Quality: azimuthalGap: -1°   stationPolarityCount: 47   misfitWeightCount: 5.5   misfit: 0.12   stationDistributionRatio: 0.43   meanDistP: 50.0   meanDistT: 52.1   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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
First-motion Focal Mechanism (HASH): Nodal Plane 1: strike: 207°   dip: 83°   rake: 162° Nodal Plane 2: strike: 299°   dip: 72°   rake: 7° Quality: azimuthalGap: 140°   stationPolarityCount: 46   misfit: 0.15   stationDistributionRatio: 0.66   rmsAngDiffAccPref: 5.69   fracAcc30degPref: 1.00   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754224705904
Event info last updated: 2025.08.03-13:37:01 UTC
Event first association/location: 2025.08.03-12:44:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA