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The IMS Infrasound Network: detection of a large variety of events, including volcanic eruptions

The IMS Infrasound Network: detection of a large variety of events, including volcanic eruptions. Dr. Paola Campus, Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) IMS, Installation and Certification Group, Acoustic Monitoring Project e-mail: Paola.Campus@ctbto.org.

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The IMS Infrasound Network: detection of a large variety of events, including volcanic eruptions

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  1. The IMS Infrasound Network: detection of a large variety of events, including volcanic eruptions Dr. Paola Campus, Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) IMS, Installation and Certification Group, Acoustic Monitoring Project e-mail: Paola.Campus@ctbto.org ITW2007: P. Campus Tokyo, 13-16 November 2007

  2. Examples of infrasound signals

  3. The International Monitoring System (IMS) Infrasound Network

  4. Earthquakes Irian Jaya, 2002/10/10, Mw=7.5IS07, Warramunga, NT, Australia: ~2000km

  5. Irian Jaya, 2002/10/10, Mw=7.5IS07

  6. Irian Jaya, 2002/10/10, Mw=7.5IS07

  7. Irian Jaya, 2002/10/10, Mw=7.5IS07: seismic waves

  8. Irian Jaya, 2002/10/10, Mw=7.5IS07: seismic waves

  9. Irian Jaya, 2002/10/10, Mw=7.5IS07: infrasound waves

  10. Irian Jaya, 2002/10/10, Mw=7.5IS07: infrasound waves

  11. Earthquakes Infrasound might help complement the information about earthquakes especially when, for local events, local seismic networks are very sparse or non existing

  12. Bolides Chicago fireball, 2003/03/27

  13. Chicago fireball • A few minutes after midnight (local time) on March 27, 2003, a huge bolide entered the atmosphere, moving across Ohio, Illinois, Indiana and Wisconsin and producing a luminous blue flash. • Fragments of the bolide hit an inhabited area of about 10 km, located south of Chicago.

  14. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

  15. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

  16. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

  17. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km • Two different bolides following two different trajectories?

  18. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

  19. Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

  20. Movements of glaciers and calving of icebergs IS18, Qaanaaq, Northern Greenland, Danemark

  21. IS18, Qaanaaq, Northern Greenland

  22. IS18, Qaanaaq, Northern Greenland

  23. IS18, infrasound signals: freq. 0.4-6 Hz

  24. IS18: long duration infrasound signal freq. 0.4-6 Hz

  25. IS18: long duration infrasound signal freq. 0.4-6 Hz • Slow movement of glacier or tide associated to it?

  26. IS18: short duration infrasound signal 1: freq. 0.4-6 Hz

  27. IS18: short duration infrasound signal 1: freq. 0.4-6 Hz

  28. IS18: short duration infrasound signal 2: freq. 0.4-6 Hz

  29. IS18: short duration infrasound signal 2: freq. 0.4-6 Hz

  30. IS18: short duration infrasound signal 3: freq. 0.4-6 Hz

  31. IS18: short duration infrasound signal 3: freq. 0.4-6 Hz

  32. Movements of glaciers and calving of icebergs Infrasound might help monitor the effects of global warming through the systematic observation of movements of glaciers and calving of icebergs

  33. Volcanoes

  34. Volcanic hazard: a serious threat to -Nearby settlements -Civil Aviation The IMS Infrasound Network can contribute to volcano monitoring

  35. The increased number of IMS Infrasound Stations allows us to monitor several active volcanic areas around the world

  36. Aleutian Islands

  37. Volcanoes AUGUSTINE Alaska, Aleutian Islands, Kamishak Bay, Southern Cook Inlet 59.363N, 153.43W; summit elev. 1,252 m Augustine is the most active volcano of the eastern Aleutian arc. On January 13, 2006 the volcano entered a period of repetitive and explosive eruptions. Each event produced ash plumes, mudflows, and pyroclastic flows

  38. AUGUSTINE, 59.363N, 153.43W, 1252m

  39. AUGUSTINE, 59.363N, 153.43W, 1252m

  40. IS53: Dist. ~ 675 km; Prop.Time ~00:37Frequency band: 0.4-8 Hz

  41. IS53: Dist. ~ 675 km; Prop.Time ~00:37Frequency band: 0.4-8 Hz

  42. Kamchatka Peninsula

  43. Volcanoes KARYMSKY Kamtchatka Peninsula, Russian Federation 54.05°N, 159.43°E; summit elev. 1,536 m Karymsky is the most active volcano of the eastern volcanic zone of Kamtchatka. Growth of the lava dome since the end of 2005. Several ash explosions on the beginning of 2006. First example: ash plumes registered on 2006/01/12. No origin time was available

  44. KARYMSKY, 54.0N, 159.5E, 4875m

  45. IS44, Petropavlovsk-Kamchatski, Russian Federation

  46. IS44: Dist.~154km; Prop.Time ~00:08Frequency band: 0.4-6 Hz

  47. IS44: Dist.~154km; Prop.Time ~00:08Frequency band: 0.4-6 Hz

  48. IS44: Dist.~154km; Prop.Time ~00:08Frequency band: 0.4-6 Hz

  49. Volcanoes KARYMSKY Two events close in time, with no significant variation in the meteorological conditions (wind speed, wind direction, temperature): the difference in the waveforms can be associated to differences in the source

  50. Volcanoes KARYMSKY From 07 May to 14 May the seismicity was above background levels, with 330-450 shallow earthquakes per day. Based on seismic data, possible ash and gas explosions. No origin time was available

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