Early-est:     Ionian Sea    2026.06.22-03:30:21.95    q:A      mb:4.3*    Mwp:-    Mwpd:-    Td*T50Ex:0.3     fmamp_polarity:./hypo.1782099022567.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782099022567.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782099022567.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: 4.3* [16]    Mwp: - [0]    Mwpd: 4.4Xinv [1]
Region: Ionian Sea
Origin Time: 2026.06.22-03:30:21.95 UTC
Hypocenter: lat: 37.28°  lon: 20.54°  [+/-6km]    depth: 9km  [+/-6km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 30   usedPhases: 26
minDist: 3.2°   maxDist: 22.1°   AzGap: 164°   2ndAzGap: 165°   atten: -1.84 [+/-0.71]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 3km   maxHorUnc: 6km   azMaxHorUnc: 158°
68%ConfEllipsoid:   semiMajorAxisLength: 8km   majorAxisAzimuth: 159°   majorAxisPlunge: 35°   semiIntermediateAxisLength: 4km   intermediateAxisAzimuth: 263°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 4km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.7 [19]    Td: 0.4s [6]    Td*T50Ex: 0.3 [6]    To: 53.5s [19]
Closest plate boundaries:
   Aegean Sea / Africa [subduction zone]: distance: ~30km
   Aegean Sea - Eurasia [continental convergent boundary]: distance: ~60km
   Eurasia / Africa [subduction zone]: distance: ~60km
   Eurasia - Africa [oceanic convergent boundary]: distance: ~90km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 YES (60km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.3
   0.3
   0.3
Td*To:
     21.4
     21.4
     21.4
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       9km
       9km
       9km
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.1782099022567.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 358°   dip: 12°   rake: -31°
Nodal Plane 2: strike: 119°   dip: 84°   rake: -100°
Quality: azimuthalGap: -1°   stationPolarityCount: 15   misfitWeightCount: 4.6   misfit: 0.09   stationDistributionRatio: 0.48   meanDistP: 43.2   meanDistT: 48.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782099022567.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.1782099022567.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: 163°   stationPolarityCount: 14   misfit: 0.99   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 45.81   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782099022567.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782099022567
Event info last updated: 2026.06.22-04:29:00 UTC
Event first association/location: 2026.06.22-03:32:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA