Early-est:     West Chile Rise    2026.10.10-21:34:02.08    q:B      mb:4.9    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791668046565.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791668046565.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791668046565.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791668046565.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.9 [31]    Mwp: 6.2X [1]    Mwpd: - [0]
Region: West Chile Rise
Origin Time: 2026.10.10-21:34:02.08 UTC
Hypocenter: lat: -36.86°  lon: -95.51°  [+/-11km]    depth: 1km  [+/-13km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 84   usedPhases: 42
minDist: 17.6°   maxDist: 165.5°   AzGap: 88°   2ndAzGap: 97°   atten: -0.75 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 11km   azMaxHorUnc: 161°
68%ConfEllipsoid:   semiMajorAxisLength: 14km   majorAxisAzimuth: 57°   majorAxisPlunge: 57°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 155°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 11km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [17]    Td: 3.1Xs [3]    Td*T50Ex: - [0]    To: 14.2s [12]
Closest plate boundaries:
   Antarctica - Nazca [oceanic transform fault]: distance: ~20km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 YES (20km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       1km
       1km
       1km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791668046565.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 9°   dip: 42°   rake: -45°
Nodal Plane 2: strike: 136°   dip: 62°   rake: -122°
Quality: azimuthalGap: -1°   stationPolarityCount: 44   misfitWeightCount: 10.1   misfit: 0.15   stationDistributionRatio: 0.31   meanDistP: 40.0   meanDistT: 45.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791668046565.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 143°   dip: 56°   rake: -129°
Nodal Plane 2: strike: 19°   dip: 50°   rake: -47°
Quality: azimuthalGap: 88°   stationPolarityCount: 44   misfit: 0.33   stationDistributionRatio: 0.49   rmsAngDiffAccPref: 39.37   fracAcc30degPref: 0.56   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791668046565.mech.hash.mechanism.jpg
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
./hypo.1791668046565.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1791668046565.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791668046565
Event info last updated: 2026.10.10-22:34:14 UTC
Event first association/location: 2026.10.10-21:43:45 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI