Early-est:     Philippine Islands Region    2023.04.22-11:15:03.15    q:B      mb:4.9    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1682162105629.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1682162105629.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1682162105629.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1682162105629.mech.fmamp_amp_mwp.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 [35]    Mwp: - [0]    Mwpd: - [0]
Region: Philippine Islands Region
Origin Time: 2023.04.22-11:15:03.15 UTC
Hypocenter: lat: 14.60°  lon: 118.68°  [+/-15km]    depth: 16km  [+/-19km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 82   usedPhases: 44
minDist: 8.5°   maxDist: 161.8°   AzGap: 90°   2ndAzGap: 106°   atten: -0.79 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 62°
68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 326°   majorAxisPlunge: 55°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 58°   intermediateAxisPlunge: 2°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [21]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.0s [16]
Closest plate boundaries:
Subduction geometry: none or not available
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:
       16km
       16km
       16km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1682162105629.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 58°   dip: 20°   rake: 39°
Nodal Plane 2: strike: 290°   dip: 77°   rake: 106°
Quality: azimuthalGap: -1°   stationPolarityCount: 43   misfitWeightCount: 6.6   misfit: 0.10   stationDistributionRatio: 0.50   meanDistP: 26.1   meanDistT: 30.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1682162105629.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 290°   dip: 72°   rake: 119°
Nodal Plane 2: strike: 48°   dip: 33°   rake: 33°
Quality: azimuthalGap: 90°   stationPolarityCount: 43   misfit: 0.24   stationDistributionRatio: 0.66   rmsAngDiffAccPref: 22.17   fracAcc30degPref: 0.82   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1682162105629.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
./hypo.1682162105629.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp
./hypo.1682162105629.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1682162105629
Event info last updated: 2023.04.22-12:15:34 UTC
Event first association/location: 2023.04.22-11:21:16 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI