Early-est:     Mona Passage    2026.02.10-20:49:12.88    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770756552779.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770756552779.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770756552779.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: 4.9* [9]    Mwp: 4.8X [1]    Mwpd: - [0]
Region: Mona Passage
Origin Time: 2026.02.10-20:49:12.88 UTC
Hypocenter: lat: 17.46°  lon: -67.99°  [+/-13km]    depth: 27km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 16   usedPhases: 13
minDist: 1.9°   maxDist: 149.3°   AzGap: 94°   2ndAzGap: 134°   atten: -1.54 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 7°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 9°   majorAxisPlunge: 84°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 187°   intermediateAxisPlunge: 6°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 29.0s [8]
Closest plate boundaries:
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       27km
       27km
       27km
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.1770756552779.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 54°   dip: 41°   rake: 175°
Nodal Plane 2: strike: 148°   dip: 87°   rake: 49°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 5.9   misfit: 0.06   stationDistributionRatio: 0.63   meanDistP: 49.5   meanDistT: 30.1   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770756552779.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.1770756552779.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 57°   dip: 55°   rake: 158°
Nodal Plane 2: strike: 160°   dip: 72°   rake: 37°
Quality: azimuthalGap: 106°   stationPolarityCount: 11   misfit: 0.24   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 48.03   fracAcc30degPref: 0.30   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770756552779.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770756552779
Event info last updated: 2026.02.10-21:48:03 UTC
Event first association/location: 2026.02.10-20:55:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA