Early-est:     Chile - Bolivia Border Region    2025.12.13-12:18:39.00    q:A      mb:5.2    Mwp:5.2    Mwpd:-    Td*T50Ex:0.6     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: 5.2 [66]    Mwp: 5.2 [4]    Mwpd: - [0] Region: Chile - Bolivia Border Region Origin Time: 2025.12.13-12:18:39.00 UTC Hypocenter: lat: -20.98°  lon: -68.91°  [+/-16km]    depth: 19km  [+/-25km] Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 142   usedPhases: 104 minDist: 2.1°   maxDist: 168.4°   AzGap: 73°   2ndAzGap: 86°   atten: -1.44 [+/-0.29] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 83° 68%ConfEllipsoid:   semiMajorAxisLength: 26km   majorAxisAzimuth: 249°   majorAxisPlunge: 64°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 102°   intermediateAxisPlunge: 22°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.5 [52]    Td: 1.1s [6]    Td*T50Ex: 0.6 [6]    To: 2.2s [41] Closest plate boundaries:    Altiplano - South America [continental rift boundary]: distance: ~60km    Nazca \ Altiplano [subduction zone]: distance: ~240km    Nazca \ South America [subduction zone]: distance: ~270km Subduction geometry:    Zone: South America    Slab depth at epicenter: 95km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  no  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    0.6    0.6    0.6 Td*To:      2.4      2.4      2.4 Mwp magnitude:        5.2        5.2        5.2 Hypocenter depth:        19km        19km        19km Slab depth at epicenter:        95km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 25°   dip: 70°   rake: -161° Nodal Plane 2: strike: 288°   dip: 72°   rake: -21° Quality: azimuthalGap: -1°   stationPolarityCount: 94   misfitWeightCount: 14.4   misfit: 0.19   stationDistributionRatio: 0.40   meanDistP: 45.8   meanDistT: 26.1   qualityCode: D 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: 10°   dip: 76°   rake: -145° Nodal Plane 2: strike: 270°   dip: 56°   rake: -16° Quality: azimuthalGap: 85°   stationPolarityCount: 94   misfit: 0.36   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 39.14   fracAcc30degPref: 0.59   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: 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/1765628325472
Event info last updated: 2025.12.13-13:18:46 UTC
Event first association/location: 2025.12.13-12:23:45 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI