Early-est:     Chile - Bolivia Border Region    2026.10.06-06:16:34.20    q:A      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 [28]    Mwp: - [0]    Mwpd: - [0] Region: Chile - Bolivia Border Region Origin Time: 2026.10.06-06:16:34.20 UTC Hypocenter: lat: -21.20°  lon: -68.50°  [+/-16km]    depth: 123km  [+/-19km] Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 67   usedPhases: 35 minDist: 1.7°   maxDist: 133.2°   AzGap: 118°   2ndAzGap: 134°   atten: -0.94 [+/-0.21] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 106° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 286°   majorAxisPlunge: 39°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 87°   intermediateAxisPlunge: 49°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.2 [21]    Td: 2.7Xs [2]    Td*T50Ex: - [0]    To: 1.6s [12] Closest plate boundaries:    Altiplano - South America [continental rift boundary]: distance: ~50km    Nazca \ Altiplano [subduction zone]: distance: ~280km    Nazca \ South America [subduction zone]: distance: ~300km Subduction geometry:    Zone: South America    Slab depth at epicenter: 111km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (280km)  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        123km        123km        123km Slab depth at epicenter:        111km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 314°   dip: 12°   rake: 87° Nodal Plane 2: strike: 138°   dip: 78°   rake: 91° Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 11.2   misfit: 0.15   stationDistributionRatio: 0.42   meanDistP: 30.4   meanDistT: 35.2   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 341°   dip: 25°   rake: 146° Nodal Plane 2: strike: 102°   dip: 76°   rake: 69° Quality: azimuthalGap: 147°   stationPolarityCount: 28   misfit: 0.30   stationDistributionRatio: 0.55   rmsAngDiffAccPref: 40.06   fracAcc30degPref: 0.51   qualityCode: D 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/1791267392140
Event info last updated: 2026.10.06-07:16:44 UTC
Event first association/location: 2026.10.06-06:18:36 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI