Early-est:     Mariana Islands Region    2025.01.26-14:47:55.94    q:B      mb:4.8    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: 4.8 [20]    Mwp: - [0]    Mwpd: - [0] Region: Mariana Islands Region Origin Time: 2025.01.26-14:47:55.94 UTC Hypocenter: lat: 16.94°  lon: 147.78°  [+/-14km]    depth: 10km  [+/-13km] Location Quality: qualityCode:  B     stdErr: 2.1s   assocPhases: 48   usedPhases: 22 minDist: 4.4°   maxDist: 123.6°   AzGap: 145°   2ndAzGap: 168°   atten: -1.39 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 61° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 60°   majorAxisPlunge: 8°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 329°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [11]    Td: -s [0]    Td*T50Ex: - [0]    To: 4.3s [9] Closest plate boundaries:    Mariana / Pacific [subduction zone]: distance: ~40km Subduction geometry:    Zone: Izu-Bonin    Slab depth at epicenter: 11km 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:        10km        10km        10km Slab depth at epicenter:        11km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 245°   dip: 28°   rake: -102° Nodal Plane 2: strike: 79°   dip: 63°   rake: -84° Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 5.5   misfit: 0.02   stationDistributionRatio: 0.31   meanDistP: 45.1   meanDistT: 46.4   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 168°   stationPolarityCount: 19   misfit: 0.99   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 36.84   fracAcc30degPref: 0.00   qualityCode: E 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/1737902875710
Event info last updated: 2025.01.26-15:48:02 UTC
Event first association/location: 2025.01.26-14:57:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI