Early-est:     Chiapas, Mexico    2026.02.05-09:52:28.51    q:C      mb:4.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770285148268.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770285148268.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770285148268.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: 4.0* [5]    Mwp: - [0]    Mwpd: - [0]
Region: Chiapas, Mexico
Origin Time: 2026.02.05-09:52:28.51 UTC
Hypocenter: lat: 16.67°  lon: -93.22°  [+/-23km]    depth: 221km  [+/-34km]
Location Quality: qualityCode:  C     stdErr: 0.5s   assocPhases: 13   usedPhases: 8
minDist: 5.9°   maxDist: 53.7°   AzGap: 176°   2ndAzGap: 198°   atten: -0.59 [+/-1.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 23km   azMaxHorUnc: 68°
68%ConfEllipsoid:   semiMajorAxisLength: 42km   majorAxisAzimuth: 66°   majorAxisPlunge: 51°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 329°   intermediateAxisPlunge: 6°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.0 [4]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.4s [4]
Closest plate boundaries:
   Cocos \ North America [subduction zone]: distance: ~280km
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 (280km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       221km
       221km
       221km
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.1770285148268.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 6°   dip: 46°   rake: -52°
Nodal Plane 2: strike: 138°   dip: 56°   rake: -122°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 2.6   misfit: 0.05   stationDistributionRatio: 0.50   meanDistP: 51.1   meanDistT: 53.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770285148268.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.1770285148268.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 354°   dip: 45°   rake: -73°
Nodal Plane 2: strike: 152°   dip: 47°   rake: -106°
Quality: azimuthalGap: 149°   stationPolarityCount: 9   misfit: 0.26   stationDistributionRatio: 0.88   rmsAngDiffAccPref: 44.78   fracAcc30degPref: 0.44   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770285148268.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770285148268
Event info last updated: 2026.02.05-10:51:00 UTC
Event first association/location: 2026.02.05-10:05:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA