Early-est:     Ionian Sea    2025.12.15-23:41:49.47    q:A      mb:5.1    Mwp:5.6    Mwpd:-    Td*T50Ex:1.7     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.1 [88]    Mwp: 5.6 [29]    Mwpd: 6.1Xinv [1] Region: Ionian Sea Origin Time: 2025.12.15-23:41:49.47 UTC Hypocenter: lat: 37.51°  lon: 20.19°  [+/-2km]    depth: 20km  [+/-3km] Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 138   usedPhases: 106 minDist: 1.4°   maxDist: 147.1°   AzGap: 48°   2ndAzGap: 52°   atten: -1.17 [+/-0.11] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 1km   maxHorUnc: 2km   azMaxHorUnc: 14° 68%ConfEllipsoid:   semiMajorAxisLength: 3km   majorAxisAzimuth: 360°   majorAxisPlunge: 70°   semiIntermediateAxisLength: 2km   intermediateAxisAzimuth: 198°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 2km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.8 [91]    Td: 2.1s [35]    Td*T50Ex: 1.7 [35]    To: 35.6s [24] Closest plate boundaries:    Aegean Sea - Eurasia [continental convergent boundary]: distance: ~30km    Eurasia / Africa [subduction zone]: distance: ~30km    Aegean Sea / Africa [subduction zone]: distance: ~30km    Eurasia - Africa [oceanic convergent boundary]: distance: ~50km    Eurasia \ Africa [subduction zone]: distance: ~520km 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 (30km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.7    1.7    1.7 Td*To:      74.8      74.8      74.8 Mwp magnitude:        5.6        5.6        5.6 Hypocenter depth:        20km        20km        20km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY): Nodal Plane 1: strike: 41°   dip: 47°   rake: 145° Nodal Plane 2: strike: 156°   dip: 66°   rake: 49° Quality: azimuthalGap: -1°   stationPolarityCount: 102   misfitWeightCount: 26.6   misfit: 0.27   stationDistributionRatio: 0.61   meanDistP: 21.6   meanDistT: 20.5   qualityCode: B Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 26°   dip: 26°   rake: 125° Nodal Plane 2: strike: 168°   dip: 69°   rake: 74° Quality: azimuthalGap: 50°   stationPolarityCount: 102   misfit: 0.33   stationDistributionRatio: 0.63   rmsAngDiffAccPref: 30.78   fracAcc30degPref: 0.71   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 6°   dip: 17°   rake: 99° Nodal Plane 2: strike: 177°   dip: 73°   rake: 87° Quality: azimuthalGap: -1°   stationPolarityCount: 23   misfitWeightCount: 3.9   misfit: 9999.90   stationDistributionRatio: 0.54   meanDistP: 43.0   meanDistT: 43.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 127°   dip: 12°   rake: -109° Nodal Plane 2: strike: 327°   dip: 78°   rake: -86° Quality: azimuthalGap: -1°   stationPolarityCount: 21   misfitWeightCount: 5.4   misfit: 9999.90   stationDistributionRatio: 0.72   meanDistP: 28.8   meanDistT: 37.9   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1765842111576
Event info last updated: 2025.12.16-00:42:07 UTC
Event first association/location: 2025.12.15-23:43:09 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI