Early-est:     Eastern Honshu, Japan    2026.06.19-18:16:56.12    q:B      mb:4.7*    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: 4.7* [28]    Mwp: 4.3X [2]    Mwpd: - [0] Region: Eastern Honshu, Japan Origin Time: 2026.06.19-18:16:56.12 UTC Hypocenter: lat: 36.67°  lon: 137.97°  [+/-30km]    depth: 215km  [+/-25km] Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 57   usedPhases: 41 minDist: 0.2°   maxDist: 153.8°   AzGap: 51°   2ndAzGap: 85°   atten: -0.92 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 30km   azMaxHorUnc: 67° 68%ConfEllipsoid:   semiMajorAxisLength: 37km   majorAxisAzimuth: 68°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 165°   intermediateAxisPlunge: 45°   semiMinorAxisLength: 21km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.0 [14]    Td: 0.3Xs [1]    Td*T50Ex: - [0]    To: 1.3s [13] Closest plate boundaries:    Okhotsk - Amur [continental convergent boundary]: distance: ~10km    Okhotsk - Philippine Sea [continental convergent boundary]: distance: ~190km    Amur / Philippine Sea [subduction zone]: distance: ~190km    Pacific \ Okhotsk [subduction zone]: distance: ~400km    Philippine Sea / Pacific [subduction zone]: distance: ~450km    Okhotsk / Pacific [subduction zone]: distance: ~730km 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 (190km)  YES (10km)  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        215km        215km        215km 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: 298°   dip: 48°   rake: 162° Nodal Plane 2: strike: 40°   dip: 77°   rake: 43° Quality: azimuthalGap: -1°   stationPolarityCount: 34   misfitWeightCount: 13.2   misfit: 0.22   stationDistributionRatio: 0.49   meanDistP: 47.1   meanDistT: 51.7   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):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 116°   dip: 80°   rake: 162° Nodal Plane 2: strike: 209°   dip: 72°   rake: 10° Quality: azimuthalGap: 119°   stationPolarityCount: 34   misfit: 0.32   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 28.91   fracAcc30degPref: 0.77   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1781893015719
Event info last updated: 2026.06.19-19:15:00 UTC
Event first association/location: 2026.06.19-18:19:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA