Early-est:     Eastern Honshu, Japan    2026.02.13-04:58:57.25    q:A      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:0.0     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: 5.0* [64]    Mwp: 5.0X [2]    Mwpd: 5.3Xinv [1] Region: Eastern Honshu, Japan Origin Time: 2026.02.13-04:58:57.25 UTC Hypocenter: lat: 37.88°  lon: 139.11°  [+/-19km]    depth: 162km  [+/-16km] Location Quality: qualityCode:  A     stdErr: 1.0s   assocPhases: 117   usedPhases: 76 minDist: 0.7°   maxDist: 157.0°   AzGap: 51°   2ndAzGap: 84°   atten: -0.66 [+/-0.22] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 19km   azMaxHorUnc: 85° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 85°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 184°   intermediateAxisPlunge: 54°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 4% T50Ex: 0.0 [52]    Td: 0.9s [5]    Td*T50Ex: 0.0 [5]    To: 1.5s [51] Closest plate boundaries:    Okhotsk - Amur [continental convergent boundary]: distance: ~110km 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  YES (110km)  no Prob underwater:  4%  4%  4% Td*T50Ex:    0.0    0.0    0.0 Td*To:      1.4      1.4      1.4 Mwp magnitude:        -        -        - Hypocenter depth:        162km        162km        162km 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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 111°   dip: 27°   rake: -174° Nodal Plane 2: strike: 15°   dip: 87°   rake: -63° Quality: azimuthalGap: -1°   stationPolarityCount: 74   misfitWeightCount: 17.6   misfit: 0.21   stationDistributionRatio: 0.58   meanDistP: 28.3   meanDistT: 42.3   qualityCode: C 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: 226°   dip: 68°   rake: 176° Nodal Plane 2: strike: 318°   dip: 86°   rake: 22° Quality: azimuthalGap: 51°   stationPolarityCount: 74   misfit: 0.41   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 32.67   fracAcc30degPref: 0.70   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1770958735735
Event info last updated: 2026.02.13-05:57:01 UTC
Event first association/location: 2026.02.13-05:08:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA