Early-est:     Galapagos Triple Junction Region    2026.08.09-11:57:36.64    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:1.0     fmamp_polarity:./hypo.1786276665428.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786276665428.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786276665428.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: 4.7* [19]    Mwp: 5.5X [2]    Mwpd: 5.3Xinv [1]
Region: Galapagos Triple Junction Region
Origin Time: 2026.08.09-11:57:36.64 UTC
Hypocenter: lat: 2.47°  lon: -101.85°  [+/-18km]    depth: 15km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 42   usedPhases: 19
minDist: 18.5°   maxDist: 148.5°   AzGap: 167°   2ndAzGap: 188°   atten: -1.47 [+/-0.44]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 55°
68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 235°   majorAxisPlunge: 3°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 142°   intermediateAxisPlunge: 45°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [14]    Td: 2.8s [5]    Td*T50Ex: 1.0 [5]    To: 8.0s [13]
Closest plate boundaries:
   Galapagos - Cocos [oceanic spreading ridge]: distance: ~20km
   Galapagos - Pacific [oceanic spreading ridge]: distance: ~30km
   Pacific - Cocos [oceanic spreading ridge]: distance: ~30km
   Galapagos - Nazca [oceanic convergent boundary]: distance: ~50km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (50km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.0
   1.0
   1.0
Td*To:
     22.4
     22.4
     22.4
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1786276665428.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 166°   dip: 8°   rake: 163°
Nodal Plane 2: strike: 273°   dip: 88°   rake: 82°
Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 7.1   misfit: 0.09   stationDistributionRatio: 0.43   meanDistP: 37.4   meanDistT: 49.0   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786276665428.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.1786276665428.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: 188°   stationPolarityCount: 19   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786276665428.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786276665428
Event info last updated: 2026.08.09-12:56:00 UTC
Event first association/location: 2026.08.09-12:06:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA