Early-est:     Hokkaido, Japan Region    2026.06.25-03:18:05.85    q:C      mb:4.4*    Mwp:-    Mwpd:-    Td*T50Ex:-     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: 4.4* [10]    Mwp: - [0]    Mwpd: - [0] Region: Hokkaido, Japan Region Origin Time: 2026.06.25-03:18:05.85 UTC Hypocenter: lat: 42.41°  lon: 140.30°  [+/-15km]    depth: 105km  [+/-24km] Location Quality: qualityCode:  C     stdErr: 1.2s   assocPhases: 14   usedPhases: 5 minDist: 1.7°   maxDist: 71.2°   AzGap: 97°   2ndAzGap: 104°   atten: -9.90 [+/-0.00] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 3° 68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 264°   majorAxisPlunge: 80°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 2°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 61% T50Ex: 0.0X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.4Xs [3] Closest plate boundaries:    Okhotsk - Amur [oceanic convergent boundary]: distance: ~130km    Pacific \ Okhotsk [subduction zone]: distance: ~390km    Okhotsk / Pacific [subduction zone]: distance: ~390km 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?:  no  no  no Prob underwater:  61%  61%  61% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        105km        105km        105km 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: 81°   dip: 23°   rake: 147° Nodal Plane 2: strike: 202°   dip: 78°   rake: 70° Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 4.0   misfit: 0.15   stationDistributionRatio: 0.58   meanDistP: 51.7   meanDistT: 51.8   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):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 234°   stationPolarityCount: 10   misfit: 0.99   stationDistributionRatio: 0.81   rmsAngDiffAccPref: 41.20   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782357487952
Event info last updated: 2026.06.25-04:17:06 UTC
Event first association/location: 2026.06.25-03:31:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA