Early-est:     Fiji Islands Region    2025.07.17-09:07:57.84    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1752743278762.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1752743278762.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1752743278762.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* [24]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.07.17-09:07:57.84 UTC
Hypocenter: lat: -20.62°  lon: -178.41°  [+/-23km]    depth: 546km  [+/-26km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 74   usedPhases: 49
minDist: 4.4°   maxDist: 153.4°   AzGap: 57°   2ndAzGap: 112°   atten: -1.18 [+/-0.29]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 23km   azMaxHorUnc: 47°
68%ConfEllipsoid:   semiMajorAxisLength: 30km   majorAxisAzimuth: 33°   majorAxisPlunge: 33°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 263°   intermediateAxisPlunge: 44°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [12]    Td: 3.1Xs [1]    Td*T50Ex: - [0]    To: 1.5s [12]
Closest plate boundaries:
Subduction geometry:    Zone: Kermadec-Tonga: 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?:
 no
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       546km
       546km
       546km
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.1752743278762.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 39°   dip: 21°   rake: 20°
Nodal Plane 2: strike: 290°   dip: 83°   rake: 110°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 6.8   misfit: 0.17   stationDistributionRatio: 0.49   meanDistP: 42.1   meanDistT: 44.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1752743278762.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.1752743278762.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 145°   dip: 82°   rake: -100°
Nodal Plane 2: strike: 17°   dip: 13°   rake: -39°
Quality: azimuthalGap: 89°   stationPolarityCount: 25   misfit: 0.32   stationDistributionRatio: 0.57   rmsAngDiffAccPref: 35.94   fracAcc30degPref: 0.58   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1752743278762.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1752743278762
Event info last updated: 2025.07.17-10:06:01 UTC
Event first association/location: 2025.07.17-09:15:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA