Early-est:     Near Coast of Chiapas, Mexico    2026.06.24-12:16:34.70    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:0.8     fmamp_polarity:./hypo.1782303392132.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782303392132.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782303392132.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: 4.8* [30]    Mwp: - [0]    Mwpd: - [0]
Region: Near Coast of Chiapas, Mexico
Origin Time: 2026.06.24-12:16:34.70 UTC
Hypocenter: lat: 15.57°  lon: -93.11°  [+/-18km]    depth: 109km  [+/-24km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 56   usedPhases: 32
minDist: 5.8°   maxDist: 147.5°   AzGap: 72°   2ndAzGap: 110°   atten: -1.33 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 18km   azMaxHorUnc: 21°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 203°   majorAxisPlunge: 48°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 350°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 6%
T50Ex: 0.6 [23]    Td: 1.3s [5]    Td*T50Ex: 0.8 [5]    To: 7.2s [23]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~180km
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 (180km)
 no
 no
Prob underwater:
 6%
 6%
 6%
Td*T50Ex:
   0.8
   0.8
   0.8
Td*To:
     9.4
     9.4
     9.4
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.1782303392132.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 149°   dip: 15°   rake: -81°
Nodal Plane 2: strike: 320°   dip: 75°   rake: -92°
Quality: azimuthalGap: -1°   stationPolarityCount: 29   misfitWeightCount: 9.5   misfit: 0.05   stationDistributionRatio: 0.59   meanDistP: 34.7   meanDistT: 35.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782303392132.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.1782303392132.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 311°   dip: 80°   rake: -118°
Nodal Plane 2: strike: 203°   dip: 29°   rake: -21°
Quality: azimuthalGap: 63°   stationPolarityCount: 29   misfit: 0.21   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 22.85   fracAcc30degPref: 0.85   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782303392132.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782303392132
Event info last updated: 2026.06.24-13:15:00 UTC
Event first association/location: 2026.06.24-12:21:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA