Early-est:     Jalisco, Mexico    2026.09.28-07:22:03.72    q:B      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790580123726.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790580123726.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790580123726.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: Jalisco, Mexico
Origin Time: 2026.09.28-07:22:03.72 UTC
Hypocenter: lat: 19.03°  lon: -103.95°  [+/-12km]    depth: 118km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 10   usedPhases: 10
minDist: 4.5°   maxDist: 125.1°   AzGap: 220°   2ndAzGap: 240°   atten: -2.09 [+/-0.60]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 12km   azMaxHorUnc: 85°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 88°   majorAxisPlunge: 9°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 186°   intermediateAxisPlunge: 43°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 4%
T50Ex: 0.6X [3]    Td: 3.1Xs [1]    Td*T50Ex: - [0]    To: 31.5Xs [2]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~100km
   Rivera - Cocos [oceanic convergent boundary]: distance: ~140km
   North America / Rivera [subduction zone]: distance: ~140km
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 (100km)
 no
 no
Prob underwater:
 4%
 4%
 4%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       118km
       118km
       118km
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.1790580123726.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 127°   dip: 33°   rake: -61°
Nodal Plane 2: strike: 274°   dip: 62°   rake: -107°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 4.5   misfit: 0.07   stationDistributionRatio: 0.34   meanDistP: 52.0   meanDistT: 55.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790580123726.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.1790580123726.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: 233°   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.1790580123726.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790580123726
Event info last updated: 2026.09.28-08:21:01 UTC
Event first association/location: 2026.09.28-07:34:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA