Early-est:     Near Coast of Central Chile    2025.12.15-08:51:35.44    q:B      mb:4.4    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: 4.4 [7]    Mwp: 4.6X [2]    Mwpd: - [0] Region: Near Coast of Central Chile Origin Time: 2025.12.15-08:51:35.44 UTC Hypocenter: lat: -30.67°  lon: -71.79°  [+/-13km]    depth: 43km  [+/-8km] Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 46   usedPhases: 14 minDist: 1.0°   maxDist: 115.6°   AzGap: 115°   2ndAzGap: 150°   atten: -2.11 [+/-0.38] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 5km   maxHorUnc: 13km   azMaxHorUnc: 96° 68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 96°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 187°   intermediateAxisPlunge: 59°   semiMinorAxisLength: 6km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.7 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 32.8Xs [1] Closest plate boundaries:    Nazca \ South America [subduction zone]: distance: ~90km Subduction geometry:    Zone: South America    Slab depth at epicenter: 24km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (90km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        43km        43km        43km Slab depth at epicenter:        24km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 25°   dip: 2°   rake: 118° Nodal Plane 2: strike: 178°   dip: 88°   rake: 89° Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 9.8   misfit: 0.09   stationDistributionRatio: 0.45   meanDistP: 21.2   meanDistT: 32.1   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: 194°   dip: 86°   rake: 114° Nodal Plane 2: strike: 292°   dip: 24°   rake: 8° Quality: azimuthalGap: 57°   stationPolarityCount: 16   misfit: 0.32   stationDistributionRatio: 0.47   rmsAngDiffAccPref: 25.72   fracAcc30degPref: 0.85   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: 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/1765788699795
Event info last updated: 2025.12.15-09:51:44 UTC
Event first association/location: 2025.12.15-08:54:33 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI