Early-est:     Colorado    2026.06.20-17:32:14.90    q:C      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1781976735195.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781976735195.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781976735195.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: 4.5* [5]    Mwp: - [0]    Mwpd: - [0]
Region: Colorado
Origin Time: 2026.06.20-17:32:14.90 UTC
Hypocenter: lat: 37.01°  lon: -104.88°  [+/-15km]    depth: 15km  [+/-14km]
Location Quality: qualityCode:  C     stdErr: 2.4s   assocPhases: 11   usedPhases: 8
minDist: 0.9°   maxDist: 148.6°   AzGap: 69°   2ndAzGap: 111°   atten: -0.36 [+/-2.03]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 124°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 304°   majorAxisPlunge: 2°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 36°   intermediateAxisPlunge: 27°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 2.2 [4]    Td: -s [0]    Td*T50Ex: - [0]    To: 148.2s [4]
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:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
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.1781976735195.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 152°   dip: 60°   rake: 20°
Nodal Plane 2: strike: 52°   dip: 73°   rake: 149°
Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 5.0   misfit: 0.00   stationDistributionRatio: 0.31   meanDistP: 47.8   meanDistT: 52.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781976735195.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.1781976735195.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 235°   dip: 26°   rake: 151°
Nodal Plane 2: strike: 351°   dip: 78°   rake: 67°
Quality: azimuthalGap: 108°   stationPolarityCount: 8   misfit: 0.28   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 46.88   fracAcc30degPref: 0.34   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781976735195.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781976735195
Event info last updated: 2026.06.20-18:31:00 UTC
Event first association/location: 2026.06.20-17:35:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA