Early-est:     Eastern Honshu, Japan    2026.06.26-13:29:02.37    q:A      mb:5.3*    Mwp:5.5    Mwpd:-    Td*T50Ex:0.5     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: 5.3* [107]    Mwp: 5.5 [7]    Mwpd: 5.7Xinv [2] Region: Eastern Honshu, Japan Origin Time: 2026.06.26-13:29:02.37 UTC Hypocenter: lat: 35.38°  lon: 138.92°  [+/-9km]    depth: 56km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 165   usedPhases: 122 minDist: 1.3°   maxDist: 156.7°   AzGap: 34°   2ndAzGap: 41°   atten: -1.18 [+/-0.15] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 8km   maxHorUnc: 9km   azMaxHorUnc: 167° 68%ConfEllipsoid:   semiMajorAxisLength: 15km   majorAxisAzimuth: 232°   majorAxisPlunge: 67°   semiIntermediateAxisLength: 11km   intermediateAxisAzimuth: 333°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 9km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.3 [92]    Td: 1.6s [7]    Td*T50Ex: 0.5 [7]    To: 2.8s [89] Closest plate boundaries:    Okhotsk - Philippine Sea [continental convergent boundary]: distance: ~40km    Okhotsk - Amur [continental convergent boundary]: distance: ~40km    Amur / Philippine Sea [subduction zone]: distance: ~40km    Pacific \ Okhotsk [subduction zone]: distance: ~290km    Philippine Sea / Pacific [subduction zone]: distance: ~300km 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)  YES (40km)  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    0.5    0.5    0.5 Td*To:      4.5      4.5      4.5 Mwp magnitude:        5.5        5.5        5.5 Hypocenter depth:        56km        56km        56km 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): Nodal Plane 1: strike: 270°   dip: 48°   rake: 131° Nodal Plane 2: strike: 37°   dip: 56°   rake: 54° Quality: azimuthalGap: -1°   stationPolarityCount: 100   misfitWeightCount: 21.9   misfit: 0.15   stationDistributionRatio: 0.65   meanDistP: 24.7   meanDistT: 22.9   qualityCode: B 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: 245°   dip: 40°   rake: 106° Nodal Plane 2: strike: 44°   dip: 51°   rake: 77° Quality: azimuthalGap: 50°   stationPolarityCount: 100   misfit: 0.13   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 34.96   fracAcc30degPref: 0.55   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782480541655
Event info last updated: 2026.06.26-14:28:02 UTC
Event first association/location: 2026.06.26-13:30:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA