Early-est:     Solomon Islands    2026.04.01-21:01:40.01    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1775077311711.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775077311711.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775077311711.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* [29]    Mwp: - [0]    Mwpd: - [0]
Region: Solomon Islands
Origin Time: 2026.04.01-21:01:40.01 UTC
Hypocenter: lat: -10.30°  lon: 161.40°  [+/-15km]    depth: 93km  [+/-22km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 48   usedPhases: 31
minDist: 1.7°   maxDist: 90.4°   AzGap: 128°   2ndAzGap: 175°   atten: -1.72 [+/-0.31]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 80°
68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 61°   majorAxisPlunge: 58°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 313°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 68%
T50Ex: 0.4 [17]    Td: 5.7Xs [1]    Td*T50Ex: - [0]    To: 1.2s [16]
Closest plate boundaries:
   Pacific / Australia [subduction zone]: distance: ~90km
Subduction geometry:    Zone: Solomon Islands: 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?:
 YES (90km)
 no
 no
Prob underwater:
 68%
 68%
 68%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       93km
       93km
       93km
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.1775077311711.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 284°   dip: 21°   rake: 59°
Nodal Plane 2: strike: 137°   dip: 72°   rake: 101°
Quality: azimuthalGap: -1°   stationPolarityCount: 24   misfitWeightCount: 7.6   misfit: 0.21   stationDistributionRatio: 0.41   meanDistP: 54.4   meanDistT: 52.8   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775077311711.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.1775077311711.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 335°   dip: 53°   rake: 173°
Nodal Plane 2: strike: 69°   dip: 84°   rake: 37°
Quality: azimuthalGap: 97°   stationPolarityCount: 24   misfit: 0.37   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 40.37   fracAcc30degPref: 0.50   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775077311711.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775077311711
Event info last updated: 2026.04.01-22:00:00 UTC
Event first association/location: 2026.04.01-21:09:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA