Early-est: Tyrrhenian Sea 2026.10.08-03:42:53.32 q:A mb:4.9 Mwp:5.1 Mwpd:- Td*T50Ex:0.0 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: 4.9 [139] Mwp: 5.1 [13] Mwpd: - [0]
Region:	Tyrrhenian Sea
Origin Time:	2026.10.08-03:42:53.32 UTC
Hypocenter:	lat: 39.21° lon: 14.23° [+/-3km] depth: 355km [+/-4km]
Location Quality:	qualityCode: A stdErr: 1.1s assocPhases: 210 usedPhases: 168 minDist: 1.2° maxDist: 146.5° AzGap: 51° 2ndAzGap: 54° atten: -1.21 [+/-0.09]
Location Uncertainty:	68%ConfEllipse: minHorUnc: 3km maxHorUnc: 3km azMaxHorUnc: 24° 68%ConfEllipsoid: semiMajorAxisLength: 4km majorAxisAzimuth: 195° majorAxisPlunge: 30° semiIntermediateAxisLength: 4km intermediateAxisAzimuth: 74° intermediateAxisPlunge: 43° semiMinorAxisLength: 3km

Tsunamigeneic Assesment:

Discriminants:

Prob Underwater: >99%
T50Ex: 0.0 [124]    Td: 0.9s [56]    Td*T50Ex: 0.0 [56]    To: 1.3s [38]
Closest plate boundaries:
   Eurasia - Africa [continental convergent boundary]: distance: ~60km
   Eurasia \ Africa [subduction zone]: distance: ~60km
   Eurasia / Africa [subduction zone]: distance: ~230km
Subduction geometry: none or not available

Decision table (TEST!):

Event type:

Subduction Zone

Other Thrust/Normal

Strike-slip

Compatible close plate boundary?:

YES (60km)

Prob underwater:

>99%

Td*T50Ex:

0.0

Td*To:

1.2

Mwp magnitude:

5.1

Hypocenter depth:

355km

Slab depth at epicenter:

n/a

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1:	strike: 162° dip: 52° rake: -133°
Nodal Plane 2:	strike: 38° dip: 55° rake: -49°
Quality:	azimuthalGap: -1° stationPolarityCount: 142 misfitWeightCount: 67.8 misfit: 0.27 stationDistributionRatio: 0.68 meanDistP: 22.6 meanDistT: 21.2 qualityCode: B
Method:	methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity

./hypo.1791430976106.mech.fmamp_polarity.mechanism.jpg

First-motion Focal Mechanism (HASH): (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1:	strike: 164° dip: 50° rake: -131°
Nodal Plane 2:	strike: 38° dip: 55° rake: -52°
Quality:	azimuthalGap: 37° stationPolarityCount: 142 misfit: 0.33 stationDistributionRatio: 0.54 rmsAngDiffAccPref: 30.91 fracAcc30degPref: 0.71 qualityCode: C
Method:	methodID: smi:gov.usgs/focalmec/HASH_1.2

./hypo.1791430976106.mech.hash.mechanism.jpg

First-motion Focal Mechanism (FMAMP_AMP_AREF):
Nodal Plane 1:	strike: 123° dip: 31° rake: 120°
Nodal Plane 2:	strike: 269° dip: 63° rake: 73°
Quality:	azimuthalGap: -1° stationPolarityCount: 28 misfitWeightCount: 8.0 misfit: 9999.90 stationDistributionRatio: 0.49 meanDistP: 18.1 meanDistT: 24.9 qualityCode: B
Method:	methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref

./hypo.1791430976106.mech.fmamp_amp_aref.mechanism.jpg

First-motion Focal Mechanism (FMAMP_AMP_MWP): (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1:	strike: 131° dip: 8° rake: -94°
Nodal Plane 2:	strike: 315° dip: 82° rake: -89°
Quality:	azimuthalGap: -1° stationPolarityCount: 10 misfitWeightCount: 5.2 misfit: 9999.90 stationDistributionRatio: 0.59 meanDistP: 27.5 meanDistT: 43.1 qualityCode: D
Method:	methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

./hypo.1791430976106.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791430976106
Event info last updated: 2026.10.08-04:43:09 UTC
Event first association/location: 2026.10.08-03:44:11 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI

Early-est: Tyrrhenian Sea 2026.10.08-03:42:53.32 q:A mb:4.9 Mwp:5.1 Mwpd:- Td*T50Ex:0.0 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!

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