Early-est:     Mariana Islands    2025.01.27-14:51:23.02    q:A      mb:5.1    Mwp:-    Mwpd:-    Td*T50Ex:1.4     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: 5.1 [112]    Mwp: 5.7X [3]    Mwpd: 5.2Xinv [1] Region: Mariana Islands Origin Time: 2025.01.27-14:51:23.02 UTC Hypocenter: lat: 17.95°  lon: 146.17°  [+/-12km]    depth: 134km  [+/-16km] Location Quality: qualityCode:  A     stdErr: 1.3s   assocPhases: 174   usedPhases: 130 minDist: 4.5°   maxDist: 156.7°   AzGap: 23°   2ndAzGap: 39°   atten: -1.41 [+/-0.11] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 12km   azMaxHorUnc: 51° 68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 223°   majorAxisPlunge: 64°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 60°   intermediateAxisPlunge: 25°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [71]    Td: 2.2s [5]    Td*T50Ex: 1.4 [5]    To: 2.5s [57] Closest plate boundaries:    Philippine Sea - Mariana [oceanic transform fault]: distance: ~140km    Mariana / Pacific [subduction zone]: distance: ~170km    Philippine Sea / Pacific [subduction zone]: distance: ~770km Subduction geometry:    Zone: Izu-Bonin    Slab depth at epicenter: 105km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (170km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.4    1.4    1.4 Td*To:      5.5      5.5      5.5 Mwp magnitude:        -        -        - Hypocenter depth:        134km        134km        134km Slab depth at epicenter:        105km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 356°   dip: 87°   rake: -2° Nodal Plane 2: strike: 86°   dip: 88°   rake: -177° Quality: azimuthalGap: -1°   stationPolarityCount: 113   misfitWeightCount: 23.5   misfit: 0.19   stationDistributionRatio: 0.45   meanDistP: 27.6   meanDistT: 37.8   qualityCode: C 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: 260°   dip: 79°   rake: 178° Nodal Plane 2: strike: 351°   dip: 88°   rake: 11° Quality: azimuthalGap: 22°   stationPolarityCount: 113   misfit: 0.31   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 23.40   fracAcc30degPref: 0.88   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/1737989483080
Event info last updated: 2025.01.27-15:51:47 UTC
Event first association/location: 2025.01.27-14:56:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI