Early-est:     Peru - Bolivia Border Region    2025.02.01-20:27:23.71    q:B      mb:4.3    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1738441643177.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738441643177.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738441643177.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738441643177.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: 4.3 [12]    Mwp: - [0]    Mwpd: - [0]
Region: Peru - Bolivia Border Region
Origin Time: 2025.02.01-20:27:23.71 UTC
Hypocenter: lat: -17.99°  lon: -69.69°  [+/-15km]    depth: 135km  [+/-16km]
Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 18   usedPhases: 13
minDist: 0.7°   maxDist: 81.7°   AzGap: 72°   2ndAzGap: 128°   atten: -1.36 [+/-0.55]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 136°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 316°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 163°   intermediateAxisPlunge: 74°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.2 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.5s [5]
Closest plate boundaries:
   Nazca \ Altiplano [subduction zone]: distance: ~260km
Subduction geometry:    Zone: South America    Slab depth at epicenter: 103km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (260km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       135km
       135km
       135km
Slab depth at epicenter:
       103km
       -
       -
./hypo.1738441643177.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 209°   dip: 46°   rake: 26°
Nodal Plane 2: strike: 100°   dip: 71°   rake: 133°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 10.0   misfit: 0.14   stationDistributionRatio: 0.43   meanDistP: 37.3   meanDistT: 33.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738441643177.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 309°   dip: 69°   rake: -159°
Nodal Plane 2: strike: 211°   dip: 70°   rake: -23°
Quality: azimuthalGap: 100°   stationPolarityCount: 14   misfit: 0.25   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 15.15   fracAcc30degPref: 0.98   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738441643177.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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.1738441643177.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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.1738441643177.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738441643177
Event info last updated: 2025.02.01-21:27:28 UTC
Event first association/location: 2025.02.01-20:31:32 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI