Early-est:     Chile - Bolivia Border Region    2026.10.09-10:22:15.39    q:B      mb:4.9    Mwp:-    Mwpd:-    Td*T50Ex:0.5     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: 4.9 [40]    Mwp: 5.2X [1]    Mwpd: - [0] Region: Chile - Bolivia Border Region Origin Time: 2026.10.09-10:22:15.39 UTC Hypocenter: lat: -19.85°  lon: -68.68°  [+/-19km]    depth: 116km  [+/-30km] Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 86   usedPhases: 49 minDist: 0.5°   maxDist: 156.2°   AzGap: 79°   2ndAzGap: 103°   atten: -1.50 [+/-0.17] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 19km   azMaxHorUnc: 120° 68%ConfEllipsoid:   semiMajorAxisLength: 32km   majorAxisAzimuth: 312°   majorAxisPlunge: 59°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 95°   intermediateAxisPlunge: 25°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.6 [32]    Td: 0.8s [6]    Td*T50Ex: 0.5 [6]    To: 1.8s [22] Closest plate boundaries:    Altiplano - South America [continental rift boundary]: distance: ~190km    Nazca \ Altiplano [subduction zone]: distance: ~280km    Nazca \ South America [subduction zone]: distance: ~360km Subduction geometry:    Zone: South America    Slab depth at epicenter: 116km 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:    0.5    0.5    0.5 Td*To:      1.4      1.4      1.4 Mwp magnitude:        -        -        - Hypocenter depth:        116km        116km        116km Slab depth at epicenter:        116km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 72°   dip: 72°   rake: 9° Nodal Plane 2: strike: 339°   dip: 81°   rake: 162° Quality: azimuthalGap: -1°   stationPolarityCount: 43   misfitWeightCount: 14.9   misfit: 0.18   stationDistributionRatio: 0.48   meanDistP: 30.9   meanDistT: 30.0   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: 171°   dip: 90°   rake: -152° Nodal Plane 2: strike: 81°   dip: 62°   rake: -0° Quality: azimuthalGap: 103°   stationPolarityCount: 43   misfit: 0.26   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 17.89   fracAcc30degPref: 0.92   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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/1791541335430
Event info last updated: 2026.10.09-11:22:18 UTC
Event first association/location: 2026.10.09-10:26:37 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI