Early-est:     Southern Sumatra, Indonesia    2026.06.22-18:03:50.65    q:C      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782151430466.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782151430466.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782151430466.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* [14]    Mwp: - [0]    Mwpd: - [0]
Region: Southern Sumatra, Indonesia
Origin Time: 2026.06.22-18:03:50.65 UTC
Hypocenter: lat: -4.23°  lon: 103.04°  [+/-43km]    depth: 59km  [+/-37km]
Location Quality: qualityCode:  C     stdErr: 1.0s   assocPhases: 44   usedPhases: 20
minDist: 0.2°   maxDist: 146.6°   AzGap: 102°   2ndAzGap: 139°   atten: -1.20 [+/-0.45]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 43km   azMaxHorUnc: 43°
68%ConfEllipsoid:   semiMajorAxisLength: 58km   majorAxisAzimuth: 225°   majorAxisPlunge: 27°   semiIntermediateAxisLength: 30km   intermediateAxisAzimuth: 5°   intermediateAxisPlunge: 57°   semiMinorAxisLength: 22km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.7s [8]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~270km
Subduction geometry:    Zone: Sumatra-Java: 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 (270km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       59km
       59km
       59km
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.1782151430466.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 66°   dip: 40°   rake: -56°
Nodal Plane 2: strike: 205°   dip: 58°   rake: -115°
Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 4.7   misfit: 0.03   stationDistributionRatio: 0.62   meanDistP: 39.3   meanDistT: 50.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782151430466.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.1782151430466.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: 192°   stationPolarityCount: 12   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782151430466.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782151430466
Event info last updated: 2026.06.22-19:02:00 UTC
Event first association/location: 2026.06.22-18:11:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA