Early-est:     West Chile Rise    2025.02.04-01:40:37.77    q:B      mb:5.2    Mwp:5.8    Mwpd:-    Td*T50Ex:1.6     fmamp_polarity:./hypo.1738633239198.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738633239198.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738633239198.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738633239198.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: 5.2 [55]    Mwp: 5.8 [15]    Mwpd: 6.0Xinv [4]
Region: West Chile Rise
Origin Time: 2025.02.04-01:40:37.77 UTC
Hypocenter: lat: -38.73°  lon: -92.50°  [+/-14km]    depth: 16km  [+/-33km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 121   usedPhases: 86
minDist: 16.1°   maxDist: 172.4°   AzGap: 68°   2ndAzGap: 78°   atten: -1.15 [+/-0.17]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 23°
68%ConfEllipsoid:   semiMajorAxisLength: 34km   majorAxisAzimuth: 164°   majorAxisPlunge: 77°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 41°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [32]    Td: 3.7s [16]    Td*T50Ex: 1.6 [16]    To: 10.3s [25]
Closest plate boundaries:
   Antarctica - Nazca [oceanic transform fault]: distance: ~30km
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 (30km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.6
   1.6
   1.6
Td*To:
     38.1
     38.1
     38.1
Mwp magnitude:
       5.8
       5.8
       5.8
Hypocenter depth:
       16km
       16km
       16km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1738633239198.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 108°   dip: 12°   rake: -108°
Nodal Plane 2: strike: 306°   dip: 78°   rake: -86°
Quality: azimuthalGap: -1°   stationPolarityCount: 72   misfitWeightCount: 13.1   misfit: 0.17   stationDistributionRatio: 0.32   meanDistP: 26.3   meanDistT: 20.5   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738633239198.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 285°   dip: 77°   rake: -174°
Nodal Plane 2: strike: 194°   dip: 84°   rake: -13°
Quality: azimuthalGap: 68°   stationPolarityCount: 72   misfit: 0.25   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 21.05   fracAcc30degPref: 0.92   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738633239198.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 88°   dip: 25°   rake: -125°
Nodal Plane 2: strike: 306°   dip: 70°   rake: -75°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 6.5   misfit: 9999.90   stationDistributionRatio: 0.57   meanDistP: 31.1   meanDistT: 31.1   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
./hypo.1738633239198.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 83°   dip: 36°   rake: -164°
Nodal Plane 2: strike: 340°   dip: 81°   rake: -55°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 9.3   misfit: 9999.90   stationDistributionRatio: 0.55   meanDistP: 39.5   meanDistT: 32.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp
./hypo.1738633239198.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738633239198
Event info last updated: 2025.02.04-02:40:42 UTC
Event first association/location: 2025.02.04-01:48:29 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI