15/05/2019 am, M7.5 New Ireland, PNG

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SUMMARY

The forum discussion centers on the Mw 7.5 earthquake that occurred offshore of New Ireland, Papua New Guinea, on May 15, 2019. The seismic event was recorded using a Force Balanced Vertical seismometer, with outputs captured from both high gain and low gain channels. According to the USGS, a tsunami alert was issued following the quake; however, no significant tsunami was recorded due to the strike-slip fault motion characteristic of the earthquake.

PREREQUISITES
  • Understanding of seismic measurement techniques, specifically using Force Balanced Vertical seismometers.
  • Familiarity with earthquake magnitude scales, particularly the moment magnitude scale (Mw).
  • Knowledge of fault mechanics, especially strike-slip fault motion.
  • Awareness of tsunami generation and monitoring protocols.
NEXT STEPS
  • Research the operational principles of Force Balanced Vertical seismometers.
  • Study the characteristics and implications of strike-slip fault motion in seismic events.
  • Explore the USGS earthquake reporting system and its impact on tsunami alerts.
  • Investigate historical data on Mw 7.5 earthquakes and their associated tsunami risks.
USEFUL FOR

Seismologists, earthquake researchers, emergency response planners, and anyone interested in seismic activity and tsunami risk assessment.

davenn
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This morning I recorded a large Mw 7.5 Quake just offshore of New Ireland, PNG

First image is the high gain vertical output from my Force Balanced Vertical seismometer

zhi.gif


This second image is the output from the same seismometer by a low gain channel

zlo1.gif
info from the USGS

https://earthquake.usgs.gov/earthquakes/eventpage/us70003kyy/executivecheers
Dave
 
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Tho a tsunami alert was issued
no significant tsunami was recorded/
This is mainly due to the fact that the event was primarily a strike-slip fault motion
 

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