Early-est:     Near Coast of Chiapas, Mexico    2026.10.07-07:43:22.13    q:A      mb:5.1    Mwp:-    Mwpd:-    Td*T50Ex:0.4     fmamp_polarity:./hypo.1791359001649.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791359001649.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791359001649.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791359001649.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: 5.1 [45]    Mwp: 4.7X [1]    Mwpd: - [0]
Region: Near Coast of Chiapas, Mexico
Origin Time: 2026.10.07-07:43:22.13 UTC
Hypocenter: lat: 14.74°  lon: -93.07°  [+/-8km]    depth: 75km  [+/-9km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 81   usedPhases: 55
minDist: 1.8°   maxDist: 148.2°   AzGap: 62°   2ndAzGap: 71°   atten: -1.24 [+/-0.18]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 8km   azMaxHorUnc: 30°
68%ConfEllipsoid:   semiMajorAxisLength: 11km   majorAxisAzimuth: 27°   majorAxisPlunge: 28°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 241°   intermediateAxisPlunge: 58°   semiMinorAxisLength: 8km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [36]    Td: 0.9s [7]    Td*T50Ex: 0.4 [7]    To: 23.9s [20]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~100km
Subduction geometry:    Zone: Central America    Slab depth at epicenter: 36km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.4
   0.4
   0.4
Td*To:
     21.5
     21.5
     21.5
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       75km
       75km
       75km
Slab depth at epicenter:
       36km
       -
       -
./hypo.1791359001649.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 109°   dip: 20°   rake: -80°
Nodal Plane 2: strike: 278°   dip: 70°   rake: -94°
Quality: azimuthalGap: -1°   stationPolarityCount: 46   misfitWeightCount: 22.2   misfit: 0.24   stationDistributionRatio: 0.58   meanDistP: 20.1   meanDistT: 22.5   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791359001649.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 127°   dip: 15°   rake: -66°
Nodal Plane 2: strike: 281°   dip: 76°   rake: -96°
Quality: azimuthalGap: 41°   stationPolarityCount: 46   misfit: 0.31   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 29.68   fracAcc30degPref: 0.73   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791359001649.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.1791359001649.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.1791359001649.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791359001649
Event info last updated: 2026.10.07-08:43:32 UTC
Event first association/location: 2026.10.07-07:45:31 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI