Early-est:     Ecuador    2025.01.31-23:02:29.21    q:A      mb:5.2    Mwp:5.7    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1738364552329.mech.fmamp_polarity.thumb.jpg     fmamp_amp_aref:./hypo.1738364552329.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738364552329.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 5.2 [89]    Mwp: 5.7 [17]    Mwpd: 5.8Xinv [6]
Region: Ecuador
Origin Time: 2025.01.31-23:02:29.21 UTC
Hypocenter: lat: -0.98°  lon: -77.83°  [+/-6km]    depth: 0km  [+/-7km]
Location Quality: qualityCode:  A     stdErr: 1.6s   assocPhases: 142   usedPhases: 118
minDist: 8.3°   maxDist: 166.6°   AzGap: 42°   2ndAzGap: 62°   atten: -1.54 [+/-0.18]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 5km   maxHorUnc: 6km   azMaxHorUnc: 83°
68%ConfEllipsoid:   semiMajorAxisLength: 8km   majorAxisAzimuth: 77°   majorAxisPlunge: 28°   semiIntermediateAxisLength: 7km   intermediateAxisAzimuth: 299°   intermediateAxisPlunge: 55°   semiMinorAxisLength: 6km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [62]    Td: 2.4s [27]    Td*T50Ex: 1.1 [27]    To: 8.4s [48]
Closest plate boundaries:
   North Andes - South America [continental convergent boundary]: distance: ~70km
   Nazca \ North Andes [subduction zone]: distance: ~370km
   Nazca \ South America [subduction zone]: distance: ~490km
Subduction geometry:    Zone: South America    Slab depth at epicenter: 168km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (70km)
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     20.2
     20.2
     20.2
Mwp magnitude:
       5.7
       5.7
       5.7
Hypocenter depth:
       0km
       0km
       0km
Slab depth at epicenter:
       168km
       -
       -
./hypo.1738364552329.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 9°   dip: 70°   rake: 14°
Nodal Plane 2: strike: 274°   dip: 76°   rake: 159°
Quality: azimuthalGap: -1°   stationPolarityCount: 113   misfitWeightCount: 14.1   misfit: 0.18   stationDistributionRatio: 0.33   meanDistP: 54.6   meanDistT: 28.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738364552329.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):
Nodal Plane 1: strike: 18°   dip: 69°   rake: -8°
Nodal Plane 2: strike: 111°   dip: 83°   rake: -158°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 5.5   misfit: 9999.90   stationDistributionRatio: 0.24   meanDistP: 20.5   meanDistT: 23.1   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
./hypo.1738364552329.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 14°   dip: 62°   rake: 8°
Nodal Plane 2: strike: 280°   dip: 83°   rake: 151°
Quality: azimuthalGap: -1°   stationPolarityCount: 15   misfitWeightCount: 5.1   misfit: 9999.90   stationDistributionRatio: 0.35   meanDistP: 26.5   meanDistT: 32.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp
./hypo.1738364552329.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738364552329
Event info last updated: 2025.02.01-00:02:38 UTC
Event first association/location: 2025.01.31-23:07:19 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI