Early-est:     Near Coast of Central Chile    2026.05.31-21:52:13.43    q:A      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1780264334365.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1780264334365.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1780264334365.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* [26]    Mwp: - [0]    Mwpd: - [0]
Region: Near Coast of Central Chile
Origin Time: 2026.05.31-21:52:13.43 UTC
Hypocenter: lat: -32.74°  lon: -71.76°  [+/-7km]    depth: 32km  [+/-9km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 45   usedPhases: 39
minDist: 1.0°   maxDist: 165.7°   AzGap: 78°   2ndAzGap: 142°   atten: -1.15 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 7km   azMaxHorUnc: 83°
68%ConfEllipsoid:   semiMajorAxisLength: 9km   majorAxisAzimuth: 80°   majorAxisPlunge: 50°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 265°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 7km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [19]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.6s [16]
Closest plate boundaries:
   Nazca \ South America [subduction zone]: distance: ~110km
Subduction geometry:    Zone: South 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 (110km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       32km
       32km
       32km
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.1780264334365.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 102°   dip: 18°   rake: -73°
Nodal Plane 2: strike: 264°   dip: 73°   rake: -95°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 9.8   misfit: 0.17   stationDistributionRatio: 0.58   meanDistP: 42.5   meanDistT: 44.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1780264334365.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.1780264334365.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 319°   dip: 84°   rake: 168°
Nodal Plane 2: strike: 51°   dip: 78°   rake: 6°
Quality: azimuthalGap: 78°   stationPolarityCount: 30   misfit: 0.32   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 37.83   fracAcc30degPref: 0.50   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1780264334365.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1780264334365
Event info last updated: 2026.05.31-22:51:00 UTC
Event first association/location: 2026.05.31-21:54:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA