Early-est:     Near Coast of Central Chile    2025.01.31-08:04:02.27    q:B      mb:4.2    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: 4.2 [5]    Mwp: - [0]    Mwpd: - [0] Region: Near Coast of Central Chile Origin Time: 2025.01.31-08:04:02.27 UTC Hypocenter: lat: -37.62°  lon: -73.63°  [+/-14km]    depth: 82km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 11   usedPhases: 11 minDist: 0.9°   maxDist: 126.3°   AzGap: 148°   2ndAzGap: 212°   atten: -1.24 [+/-0.38] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 14km   azMaxHorUnc: 99° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 107°   majorAxisPlunge: 60°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 273°   intermediateAxisPlunge: 29°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 52% T50Ex: 0.4X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: -s [0] Closest plate boundaries:    Nazca \ South America [subduction zone]: distance: ~90km Subduction geometry:    Zone: South America    Slab depth at epicenter: 22km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (90km)  no  no Prob underwater:  52%  52%  52% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        82km        82km        82km Slab depth at epicenter:        22km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (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
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: 187°   stationPolarityCount: 5   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: F 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/1738310642422
Event info last updated: 2025.01.31-09:04:29 UTC
Event first association/location: 2025.01.31-08:17:03 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI