Early-est:     Dodecanese Islands, Greece    2026.06.20-20:06:21.57    q:A      mb:4.0*    Mwp:-    Mwpd:-    Td*T50Ex:0.1     fmamp_polarity:./hypo.1781985980881.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781985980881.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781985980881.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: 4.0* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Dodecanese Islands, Greece
Origin Time: 2026.06.20-20:06:21.57 UTC
Hypocenter: lat: 36.40°  lon: 26.97°  [+/-7km]    depth: 111km  [+/-8km]
Location Quality: qualityCode:  A     stdErr: 1.5s   assocPhases: 34   usedPhases: 23
minDist: 1.3°   maxDist: 41.5°   AzGap: 138°   2ndAzGap: 167°   atten: -1.93 [+/-0.73]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 7km   maxHorUnc: 7km   azMaxHorUnc: 21°
68%ConfEllipsoid:   semiMajorAxisLength: 9km   majorAxisAzimuth: 61°   majorAxisPlunge: 40°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 153°   intermediateAxisPlunge: 3°   semiMinorAxisLength: 7km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [11]    Td: 0.4s [8]    Td*T50Ex: 0.1 [8]    To: 3.2s [11]
Closest plate boundaries:
   Aegean Sea - Anatolia [continental rift boundary]: distance: ~140km
   Aegean Sea / Africa [subduction zone]: distance: ~200km
   Anatolia / Africa [subduction zone]: distance: ~270km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (200km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.1
   0.1
   0.1
Td*To:
     1.3
     1.3
     1.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       111km
       111km
       111km
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.1781985980881.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 94°   dip: 10°   rake: -68°
Nodal Plane 2: strike: 252°   dip: 80°   rake: -94°
Quality: azimuthalGap: -1°   stationPolarityCount: 18   misfitWeightCount: 8.2   misfit: 0.05   stationDistributionRatio: 0.47   meanDistP: 35.4   meanDistT: 46.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781985980881.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.1781985980881.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 55°   dip: 25°   rake: -83°
Nodal Plane 2: strike: 227°   dip: 65°   rake: -93°
Quality: azimuthalGap: 85°   stationPolarityCount: 18   misfit: 0.26   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 36.72   fracAcc30degPref: 0.57   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781985980881.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781985980881
Event info last updated: 2026.06.20-21:05:02 UTC
Event first association/location: 2026.06.20-20:09:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA