Did You Feel the Major Quake in PNG? Check Out the Seismograms!

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Discussion Overview

The discussion revolves around a recent magnitude 7.5 earthquake in Papua New Guinea (PNG), its implications for nearby volcanic activity, and the experiences of participants in recording seismic data. The scope includes technical aspects of seismology, geological processes related to subduction zones, and personal anecdotes related to earthquake monitoring.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant reports on the magnitude and location of the earthquake, providing links to seismograms.
  • Another participant raises a question about the potential dangers of earthquakes occurring near volcanoes.
  • A different participant discusses the relationship between subduction zone earthquakes and volcanic activity, suggesting that while earthquakes can contribute to volcanic processes, they do not necessarily indicate imminent eruptions.
  • One participant shares their experience of successfully recording the earthquake and subsequent aftershocks, while also mentioning technical difficulties with their recording equipment.

Areas of Agreement / Disagreement

Participants express varying views on the implications of the earthquake for volcanic activity, with some suggesting a connection while others emphasize the long timescales involved in volcanic processes. The discussion remains unresolved regarding the immediate effects of the earthquake on nearby volcanoes.

Contextual Notes

Participants note the complexity of geological processes and the limitations of predicting volcanic eruptions based on seismic activity. There are references to specific seismic events and technical challenges faced in monitoring them.

davenn
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well in the case of subduction zone quakes, its the subducting crust/ lithosphere that provides melt material that will eventually come back up
in eruptions. Quakes in today's quake region and a bit further west would be responsible for "feeding" the Rabaul volcanoes not far to the north/NW.

Remember the subduction, melting and rising of the resulting magma is on very long time periods. So a big quake there today, doesn't infer an eruption in the near future. Any near future eruptions would be from already existing rising plumes. Its just a long ongoing process :smile:

Dave
 
One of the channel seismograms from this event ...

150329.234553.sydln.gif
 
I was lucky to get this quake yesterday. Some hours after it occurred and just after I saved the files
the computer that runs the seismo recorder failed. Look like the mother board has fallen over :frown:

Several weeks ago a friend gave me his old computer system and after spending some time cleaning out all his programs and other stuff
I was able to install the logging software and get it up and running again. Just in time to record a M 5.5 from the central Indian Ocean
and this morning a M 5.7 aftershock from the Tonga Samoa region quakes.
I missed recording the Tonga Samoa region quakes last nite as the system was in the middle of multiple failures
They were a M 6.4 and a M 6.5 around 30 minutes apart

The joys of live science

cheers
Dave
 
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