Early-est:     Ryukyu Islands, Japan    2026.03.30-01:12:33.59    q:C      mb:4.9*    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: 4.9* [19]    Mwp: 5.6X [2]    Mwpd: 5.8Xinv [1] Region: Ryukyu Islands, Japan Origin Time: 2026.03.30-01:12:33.59 UTC Hypocenter: lat: 26.29°  lon: 128.97°  [+/-41km]    depth: 15km  [+/-27km] Location Quality: qualityCode:  C     stdErr: 1.8s   assocPhases: 46   usedPhases: 24 minDist: 0.8°   maxDist: 89.1°   AzGap: 78°   2ndAzGap: 149°   atten: -0.51 [+/-0.32] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 34km   maxHorUnc: 41km   azMaxHorUnc: 113° 68%ConfEllipsoid:   semiMajorAxisLength: 50km   majorAxisAzimuth: 113°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 42km   intermediateAxisAzimuth: 23°   intermediateAxisPlunge: 10°   semiMinorAxisLength: 27km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [18]    Td: 2.5Xs [2]    Td*T50Ex: - [0]    To: 21.8s [16] Closest plate boundaries:    Okinawa / Philippine Sea [subduction zone]: distance: ~40km Subduction geometry:    Zone: Ryukyu: 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)  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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 76°   dip: 24°   rake: -46° Nodal Plane 2: strike: 210°   dip: 73°   rake: -107° Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 4.9   misfit: 0.06   stationDistributionRatio: 0.55   meanDistP: 43.2   meanDistT: 39.2   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: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 219°   dip: 60°   rake: -105° Nodal Plane 2: strike: 67°   dip: 33°   rake: -66° Quality: azimuthalGap: 103°   stationPolarityCount: 22   misfit: 0.23   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 36.42   fracAcc30degPref: 0.52   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1774833160130
Event info last updated: 2026.03.30-02:11:00 UTC
Event first association/location: 2026.03.30-01:23:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA