Early-est:     Oaxaca, Mexico    2025.11.09-07:06:15.67    q:B      mb:4.4    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1762671976029.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1762671976029.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1762671976029.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1762671976029.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: 4.4 [15]    Mwp: - [0]    Mwpd: - [0]
Region: Oaxaca, Mexico
Origin Time: 2025.11.09-07:06:15.67 UTC
Hypocenter: lat: 16.81°  lon: -94.39°  [+/-13km]    depth: 135km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.7s   assocPhases: 61   usedPhases: 23
minDist: 2.2°   maxDist: 117.6°   AzGap: 117°   2ndAzGap: 136°   atten: -1.35 [+/-0.27]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 13km   azMaxHorUnc: 7°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 338°   majorAxisPlunge: 74°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 191°   intermediateAxisPlunge: 13°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [12]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.3s [6]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~220km
Subduction geometry:    Zone: Central America    Slab depth at epicenter: 109km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (220km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       135km
       135km
       135km
Slab depth at epicenter:
       109km
       -
       -
./hypo.1762671976029.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 20°   dip: 4°   rake: 143°
Nodal Plane 2: strike: 148°   dip: 88°   rake: 87°
Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 11.1   misfit: 0.16   stationDistributionRatio: 0.46   meanDistP: 29.7   meanDistT: 32.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1762671976029.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 197°   dip: 8°   rake: -23°
Nodal Plane 2: strike: 310°   dip: 87°   rake: -97°
Quality: azimuthalGap: 134°   stationPolarityCount: 20   misfit: 0.42   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 42.40   fracAcc30degPref: 0.43   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1762671976029.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.1762671976029.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.1762671976029.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1762671976029
Event info last updated: 2025.11.09-08:06:36 UTC
Event first association/location: 2025.11.09-07:11:50 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI