Early-est:     Near West Coast of Honshu, Japan    2026.02.14-08:14:56.10    q:C      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1771056896096.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1771056896096.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1771056896096.mech.hash.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 4.2* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Near West Coast of Honshu, Japan
Origin Time: 2026.02.14-08:14:56.10 UTC
Hypocenter: lat: 36.33°  lon: 136.29°  [+/-58km]    depth: 412km  [+/-47km]
Location Quality: qualityCode:  C     stdErr: 0.6s   assocPhases: 13   usedPhases: 10
minDist: 1.1°   maxDist: 54.1°   AzGap: 133°   2ndAzGap: 181°   atten: -0.50 [+/-0.35]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 58km   azMaxHorUnc: 137°
68%ConfEllipsoid:   semiMajorAxisLength: 82km   majorAxisAzimuth: 138°   majorAxisPlunge: 30°   semiIntermediateAxisLength: 31km   intermediateAxisAzimuth: 248°   intermediateAxisPlunge: 30°   semiMinorAxisLength: 25km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 48%
T50Ex: 0.0X [1]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.3Xs [1]
Closest plate boundaries:
   Okhotsk - Amur [continental convergent boundary]: distance: ~140km
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 (140km)
 no
Prob underwater:
 48%
 48%
 48%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       412km
       412km
       412km
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)
./hypo.1771056896096.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 318°   dip: 39°   rake: -95°
Nodal Plane 2: strike: 144°   dip: 51°   rake: -86°
Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 4.9   misfit: 0.00   stationDistributionRatio: 0.52   meanDistP: 45.8   meanDistT: 47.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1771056896096.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1771056896096.mech.fmamp_polarity_waveform.mechanism.jpg
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: 220°   stationPolarityCount: 8   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1771056896096.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1771056896096
Event info last updated: 2026.02.14-09:13:01 UTC
Event first association/location: 2026.02.14-08:51:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA