Early-est:     Near Coast of Chiapas, Mexico    2026.09.29-08:22:11.65    q:B      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790670131699.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790670131699.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790670131699.mech.hash.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.1* [8]    Mwp: - [0]    Mwpd: - [0]
Region: Near Coast of Chiapas, Mexico
Origin Time: 2026.09.29-08:22:11.65 UTC
Hypocenter: lat: 14.79°  lon: -92.04°  [+/-13km]    depth: 109km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 0.6s   assocPhases: 10   usedPhases: 9
minDist: 6.5°   maxDist: 126.4°   AzGap: 139°   2ndAzGap: 208°   atten: -1.57 [+/-0.87]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 13km   azMaxHorUnc: 32°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 59°   majorAxisPlunge: 62°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 185°   intermediateAxisPlunge: 17°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.5 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 32.4s [5]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~150km
   Caribbean - North America [continental rift boundary]: distance: ~200km
   Caribbean / Cocos [subduction zone]: distance: ~270km
Subduction geometry:    Zone: Central America: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (150km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       109km
       109km
       109km
Slab depth at epicenter:
       n/a
       -
       -
Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)
./hypo.1790670131699.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 80°   dip: 73°   rake: 178°
Nodal Plane 2: strike: 171°   dip: 88°   rake: 17°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 3.2   misfit: 0.03   stationDistributionRatio: 0.55   meanDistP: 52.6   meanDistT: 52.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790670131699.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
./hypo.1790670131699.mech.fmamp_polarity_waveform.mechanism.jpg
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: 201°   stationPolarityCount: 9   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790670131699.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790670131699
Event info last updated: 2026.09.29-09:21:00 UTC
Event first association/location: 2026.09.29-08:28:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA