Early-est:     Near East Coast of Honshu, Japan    2026.06.25-11:58:29.35    q:C      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782388711677.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782388711677.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782388711677.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: 5.0* [39]    Mwp: 4.2X [1]    Mwpd: - [0]
Region: Near East Coast of Honshu, Japan
Origin Time: 2026.06.25-11:58:29.35 UTC
Hypocenter: lat: 40.24°  lon: 142.59°  [+/-44km]    depth: 15km  [+/-43km]
Location Quality: qualityCode:  C     stdErr: 2.0s   assocPhases: 75   usedPhases: 48
minDist: 1.3°   maxDist: 151.5°   AzGap: 112°   2ndAzGap: 137°   atten: -0.77 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 22km   maxHorUnc: 44km   azMaxHorUnc: 95°
68%ConfEllipsoid:   semiMajorAxisLength: 55km   majorAxisAzimuth: 275°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 43km   intermediateAxisAzimuth: 133°   intermediateAxisPlunge: 84°   semiMinorAxisLength: 28km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [22]    Td: 1.1Xs [2]    Td*T50Ex: - [0]    To: 2.7s [20]
Closest plate boundaries:
   Pacific \ Okhotsk [subduction zone]: distance: ~140km
   Okhotsk / Pacific [subduction zone]: distance: ~170km
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 (140km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1782388711677.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 103°   dip: 23°   rake: 78°
Nodal Plane 2: strike: 296°   dip: 67°   rake: 95°
Quality: azimuthalGap: -1°   stationPolarityCount: 41   misfitWeightCount: 6.2   misfit: 0.16   stationDistributionRatio: 0.48   meanDistP: 47.8   meanDistT: 47.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782388711677.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.1782388711677.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 289°   dip: 54°   rake: 127°
Nodal Plane 2: strike: 57°   dip: 49°   rake: 50°
Quality: azimuthalGap: 141°   stationPolarityCount: 41   misfit: 0.22   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 37.14   fracAcc30degPref: 0.50   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782388711677.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782388711677
Event info last updated: 2026.06.25-12:57:01 UTC
Event first association/location: 2026.06.25-12:07:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA