Early-est:     Mariana Islands Region    2026.10.05-10:52:11.04    q:B      mb:5.0    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 5.0 [29]    Mwp: - [0]    Mwpd: - [0] Region: Mariana Islands Region Origin Time: 2026.10.05-10:52:11.04 UTC Hypocenter: lat: 15.74°  lon: 147.58°  [+/-15km]    depth: 10km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 65   usedPhases: 37 minDist: 3.4°   maxDist: 151.1°   AzGap: 73°   2ndAzGap: 81°   atten: -1.11 [+/-0.27] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 35° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 214°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 123°   intermediateAxisPlunge: 2°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [17]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.2s [14] Closest plate boundaries:    Mariana / Pacific [subduction zone]: distance: ~20km Subduction geometry:    Zone: Izu-Bonin    Slab depth at epicenter: 9km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (20km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        9km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 99°   dip: 58°   rake: 172° Nodal Plane 2: strike: 193°   dip: 83°   rake: 32° Quality: azimuthalGap: -1°   stationPolarityCount: 35   misfitWeightCount: 6.5   misfit: 0.09   stationDistributionRatio: 0.27   meanDistP: 41.7   meanDistT: 42.4   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 93°   dip: 57°   rake: 169° Nodal Plane 2: strike: 189°   dip: 80°   rake: 33° Quality: azimuthalGap: 80°   stationPolarityCount: 35   misfit: 0.28   stationDistributionRatio: 0.70   rmsAngDiffAccPref: 38.00   fracAcc30degPref: 0.62   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1791197530546
Event info last updated: 2026.10.05-11:52:47 UTC
Event first association/location: 2026.10.05-10:58:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI