Early-est:     Off Coast of Central Chile    2025.02.02-15:00:59.77    q:B      mb:4.2    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: 4.2 [5]    Mwp: - [0]    Mwpd: - [0] Region: Off Coast of Central Chile Origin Time: 2025.02.02-15:00:59.77 UTC Hypocenter: lat: -33.79°  lon: -72.22°  [+/-8km]    depth: 20km  [+/-10km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 16   usedPhases: 13 minDist: 1.2°   maxDist: 152.6°   AzGap: 172°   2ndAzGap: 199°   atten: -1.31 [+/-0.46] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 8km   azMaxHorUnc: 88° 68%ConfEllipsoid:   semiMajorAxisLength: 10km   majorAxisAzimuth: 99°   majorAxisPlunge: 54°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 258°   intermediateAxisPlunge: 34°   semiMinorAxisLength: 8km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.7 [4]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.9Xs [1] Closest plate boundaries:    Nazca \ South America [subduction zone]: distance: ~70km Subduction geometry:    Zone: South America    Slab depth at epicenter: 18km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (70km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        20km        20km        20km Slab depth at epicenter:        18km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 30°   dip: 15°   rake: -38° Nodal Plane 2: strike: 156°   dip: 81°   rake: -102° Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 4.6   misfit: 0.11   stationDistributionRatio: 0.45   meanDistP: 30.3   meanDistT: 42.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 172°   stationPolarityCount: 11   misfit: 0.99   stationDistributionRatio: 0.61   rmsAngDiffAccPref: 31.94   fracAcc30degPref: 0.00   qualityCode: E 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/1738508460133
Event info last updated: 2025.02.02-16:01:03 UTC
Event first association/location: 2025.02.02-15:13:35 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI