Early-est:     Peru - Bolivia Border Region    2025.12.07-23:14:13.87    q:B      mb:4.7    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: 4.7 [23]    Mwp: 5.0X [2]    Mwpd: - [0] Region: Peru - Bolivia Border Region Origin Time: 2025.12.07-23:14:13.87 UTC Hypocenter: lat: -17.71°  lon: -69.84°  [+/-17km]    depth: 105km  [+/-19km] Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 53   usedPhases: 32 minDist: 0.8°   maxDist: 165.0°   AzGap: 61°   2ndAzGap: 93°   atten: -1.19 [+/-0.30] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 17km   azMaxHorUnc: 93° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 274°   majorAxisPlunge: 33°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 39°   intermediateAxisPlunge: 41°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.6 [18]    Td: 0.9Xs [1]    Td*T50Ex: - [0]    To: 1.8s [9] Closest plate boundaries:    Nazca \ Altiplano [subduction zone]: distance: ~270km Subduction geometry:    Zone: South America    Slab depth at epicenter: 106km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (270km)  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        105km        105km        105km Slab depth at epicenter:        106km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 292°   dip: 55°   rake: -40° Nodal Plane 2: strike: 48°   dip: 58°   rake: -138° Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 13.3   misfit: 0.19   stationDistributionRatio: 0.55   meanDistP: 27.6   meanDistT: 46.4   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: 44°   dip: 67°   rake: -121° Nodal Plane 2: strike: 280°   dip: 38°   rake: -40° Quality: azimuthalGap: 61°   stationPolarityCount: 28   misfit: 0.29   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 40.08   fracAcc30degPref: 0.58   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/1765149252445
Event info last updated: 2025.12.08-00:15:06 UTC
Event first association/location: 2025.12.07-23:18:07 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI