ITW2007: P. Campus Tokyo, 13-16 November 2007 The IMS Infrasound Network: detection of a large variety of events, including volcanic eruptions Dr. Paola.

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Presentation transcript:

ITW2007: P. Campus Tokyo, November 2007 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 ITW2007: P. Campus Tokyo, November 2007

Examples of infrasound signals

ITW2007: P. Campus Tokyo, November 2007 The International Monitoring System (IMS) Infrasound Network

ITW2007: P. Campus Tokyo, November 2007 Earthquakes Irian Jaya, 2002/10/10, Mw=7.5 IS07, Warramunga, NT, Australia: ~2000km

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07: seismic waves

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07: seismic waves

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07: infrasound waves

ITW2007: P. Campus Tokyo, November 2007 Irian Jaya, 2002/10/10, Mw=7.5 IS07: infrasound waves

ITW2007: P. Campus Tokyo, November 2007 Infrasound might help complement the information about earthquakes especially when, for local events, local seismic networks are very sparse or non existing Earthquakes

ITW2007: P. Campus Tokyo, November 2007 Bolides Chicago fireball, 2003/03/27

ITW2007: P. Campus Tokyo, November 2007 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. Chicago fireball

ITW2007: P. Campus Tokyo, November 2007 Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Two different bolides following two different trajectories? Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Chicago fireball, IS10, Lac du Bonnet, Canada: ~1170km

ITW2007: P. Campus Tokyo, November 2007 Movements of glaciers and calving of icebergs IS18, Qaanaaq, Northern Greenland, Danemark

ITW2007: P. Campus Tokyo, November 2007 IS18, Qaanaaq, Northern Greenland

ITW2007: P. Campus Tokyo, November 2007 IS18, Qaanaaq, Northern Greenland

ITW2007: P. Campus Tokyo, November 2007 IS18, infrasound signals: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: long duration infrasound signal freq Hz

ITW2007: P. Campus Tokyo, November 2007 Slow movement of glacier or tide associated to it? IS18: long duration infrasound signal freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 1: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 1: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 2: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 2: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 3: freq Hz

ITW2007: P. Campus Tokyo, November 2007 IS18: short duration infrasound signal 3: freq Hz

ITW2007: P. Campus Tokyo, November 2007 Infrasound might help monitor the effects of global warming through the systematic observation of movements of glaciers and calving of icebergs Movements of glaciers and calving of icebergs

ITW2007: P. Campus Tokyo, November 2007 Volcanoes

ITW2007: P. Campus Tokyo, November 2007 Volcanic hazard: a serious threat to -Nearby settlements -Civil Aviation The IMS Infrasound Network can contribute to volcano monitoring

ITW2007: P. Campus Tokyo, November 2007 The increased number of IMS Infrasound Stations allows us to monitor several active volcanic areas around the world

ITW2007: P. Campus Tokyo, November 2007 Aleutian Islands

ITW2007: P. Campus Tokyo, November 2007 AUGUSTINE Alaska, Aleutian Islands, Kamishak Bay, Southern Cook Inlet N, W; 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 Volcanoes

ITW2007: P. Campus Tokyo, November 2007 AUGUSTINE, N, W, 1252m

ITW2007: P. Campus Tokyo, November 2007 AUGUSTINE, N, W, 1252m

ITW2007: P. Campus Tokyo, November 2007 IS53: Dist. ~ 675 km; Prop.Time ~00:37 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 IS53: Dist. ~ 675 km; Prop.Time ~00:37 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 Kamchatka Peninsula

ITW2007: P. Campus Tokyo, November 2007 KARYMSKY Kamtchatka Peninsula, Russian Federation 54.05°N, °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 Several ash explosions on the beginning of First example: ash plumes registered on 2006/01/12. No origin time was available Volcanoes

ITW2007: P. Campus Tokyo, November 2007 KARYMSKY, 54.0N, 159.5E, 4875m

ITW2007: P. Campus Tokyo, November 2007 IS44, Petropavlovsk-Kamchatski, Russian Federation

ITW2007: P. Campus Tokyo, November 2007 IS44: Dist.~154km; Prop.Time ~00:08 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 IS44: Dist.~154km; Prop.Time ~00:08 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 IS44: Dist.~154km; Prop.Time ~00:08 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 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 Volcanoes

ITW2007: P. Campus Tokyo, November 2007 KARYMSKY From 07 May to 14 May the seismicity was above background levels, with shallow earthquakes per day. Based on seismic data, possible ash and gas explosions. No origin time was available Volcanoes

ITW2007: P. Campus Tokyo, November 2007 IS44: Dist.~154km; Prop.Time ~00:08 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 IS44: Dist.~154km; Prop.Time ~00:08 Frequency band: Hz

ITW2007: P. Campus Tokyo, November 2007 The presence of an infrasound station in a volcanic area can be extremely useful to monitor the beginning of an eruption and to define its origin time. In addition, an infrasound station can be used both as a unique volcano monitoring tool in case other monitoring systems are not available (or cannot be used), and as a complementary tool to other, already existing, monitoring systems.

ITW2007: P. Campus Tokyo, November 2007 The IMS Infrasound Network is not only a powerful tool to monitor nuclear explosions, but it can also provide a significant contribution to monitor natural events: Complement or provide information about earthquakes Complement or provide information about bolides, meteorites, auroras Monitor effects of global warming Complement or provide information about volcanic eruptions (origin time, source characteristics) Conclusions