Early-est:     Cuba Region    2026.02.08-12:00:10.97    q:A      mb:5.4    Mwp:5.7*    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1770552011569.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770552011569.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770552011569.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: 5.4 [114]    Mwp: 5.7* [26]    Mwpd: 6.0Xinv [23]
Region: Cuba Region
Origin Time: 2026.02.08-12:00:10.97 UTC
Hypocenter: lat: 19.89°  lon: -74.46°  [+/-21km]    depth: 12km  [+/-19km]
Location Quality: qualityCode:  A     stdErr: 1.5s   assocPhases: 224   usedPhases: 157
minDist: 0.6°   maxDist: 166.7°   AzGap: 34°   2ndAzGap: 39°   atten: -1.28 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 21km   azMaxHorUnc: 0°
68%ConfEllipsoid:   semiMajorAxisLength: 26km   majorAxisAzimuth: 0°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 245°   intermediateAxisPlunge: 81°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [110]    Td: 2.2s [12]    Td*T50Ex: 1.1 [12]    To: 11.5s [107]
Closest plate boundaries:
   Caribbean - North America [continental transform fault]: distance: ~30km
   Caribbean \ North Andes [subduction zone]: distance: ~740km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 YES (30km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     25.3
     25.3
     25.3
Mwp magnitude:
       5.7*
       5.7*
       5.7*
Hypocenter depth:
       12km
       12km
       12km
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.1770552011569.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 126°   dip: 47°   rake: 126°
Nodal Plane 2: strike: 259°   dip: 54°   rake: 58°
Quality: azimuthalGap: -1°   stationPolarityCount: 115   misfitWeightCount: 14.3   misfit: 0.16   stationDistributionRatio: 0.49   meanDistP: 43.4   meanDistT: 41.2   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770552011569.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 5°   dip: 12°   rake: -169°
Nodal Plane 2: strike: 264°   dip: 88°   rake: -78°
Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 3.9   misfit: 0.00   stationDistributionRatio: 0.44   meanDistP: 52.3   meanDistT: 52.8   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1770552011569.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 156°   dip: 42°   rake: 72°
Nodal Plane 2: strike: 359°   dip: 51°   rake: 105°
Quality: azimuthalGap: 34°   stationPolarityCount: 115   misfit: 0.22   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 41.08   fracAcc30degPref: 0.44   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770552011569.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770552011569
Event info last updated: 2026.02.08-12:59:02 UTC
Event first association/location: 2026.02.08-12:02:08 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA