Early-est:     Northern Chile    2026.10.08-05:35:56.57    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 [13]    Mwp: - [0]    Mwpd: - [0] Region: Northern Chile Origin Time: 2026.10.08-05:35:56.57 UTC Hypocenter: lat: -22.10°  lon: -68.59°  [+/-18km]    depth: 120km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 18   usedPhases: 15 minDist: 0.9°   maxDist: 67.4°   AzGap: 131°   2ndAzGap: 168°   atten: -0.90 [+/-0.40] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 171° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 172°   majorAxisPlunge: 26°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 301°   intermediateAxisPlunge: 52°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.8 [6]    Td: 0.3Xs [1]    Td*T50Ex: - [0]    To: 2.1Xs [1] Closest plate boundaries:    Altiplano - South America [continental rift boundary]: distance: ~80km    Nazca \ South America [subduction zone]: distance: ~280km    Nazca \ Altiplano [subduction zone]: distance: ~280km Subduction geometry:    Zone: South America    Slab depth at epicenter: 105km 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:        120km        120km        120km Slab depth at epicenter:        105km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 72°   dip: 38°   rake: 89° Nodal Plane 2: strike: 253°   dip: 52°   rake: 91° Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 5.8   misfit: 0.08   stationDistributionRatio: 0.32   meanDistP: 43.3   meanDistT: 42.3   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: 60°   dip: 62°   rake: 97° Nodal Plane 2: strike: 224°   dip: 29°   rake: 76° Quality: azimuthalGap: 139°   stationPolarityCount: 16   misfit: 0.44   stationDistributionRatio: 0.52   rmsAngDiffAccPref: 42.19   fracAcc30degPref: 0.47   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/1791437761813
Event info last updated: 2026.10.08-06:36:03 UTC
Event first association/location: 2026.10.08-05:41:43 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI