Early-est:     Ryukyu Islands, Japan    2026.03.29-07:08:01.99    q:C      mb:4.8*    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: 4.8* [14]    Mwp: 4.4X [3]    Mwpd: 5.5Xinv [1] Region: Ryukyu Islands, Japan Origin Time: 2026.03.29-07:08:01.99 UTC Hypocenter: lat: 28.06°  lon: 128.32°  [+/-15km]    depth: 62km  [+/-36km] Location Quality: qualityCode:  C     stdErr: 2.4s   assocPhases: 41   usedPhases: 19 minDist: 1.2°   maxDist: 86.6°   AzGap: 87°   2ndAzGap: 116°   atten: -0.85 [+/-0.24] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 11° 68%ConfEllipsoid:   semiMajorAxisLength: 36km   majorAxisAzimuth: 61°   majorAxisPlunge: 79°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 178°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [14]    Td: 1.9Xs [3]    Td*T50Ex: - [0]    To: 7.5s [13] Closest plate boundaries:    Yangtze - Okinawa [continental rift boundary]: distance: ~30km    Okinawa / Philippine Sea [subduction zone]: distance: ~210km 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 (210km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        62km        62km        62km 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: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 171°   dip: 3°   rake: 19° Nodal Plane 2: strike: 61°   dip: 89°   rake: 93° Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 6.6   misfit: 0.09   stationDistributionRatio: 0.42   meanDistP: 48.9   meanDistT: 45.7   qualityCode: D 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: 336°   dip: 4°   rake: 169° Nodal Plane 2: strike: 77°   dip: 89°   rake: 86° Quality: azimuthalGap: 116°   stationPolarityCount: 17   misfit: 0.22   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 38.71   fracAcc30degPref: 0.52   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1774768079729
Event info last updated: 2026.03.29-08:07:00 UTC
Event first association/location: 2026.03.29-07:17:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA