Bayrakci G. Noisy Oceans. Monitoring Seismic and Acoustic Signals...2023
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Textbook in PDF format Measuring devices such as ocean bottom seismometers and hydrophones designed to detect earthquakes pick up many other signals. These were previously ignored as background noise from unknown sources, but advanced technology now allows insights into the noise created from icebergs, ships, hydrothermal vents, whales, rain, marine engineering, and more. Noisy Oceans: Monitoring Seismic and Acoustic Signals in the Marine Environment is a comprehensive guide to non-tectonic marine noise originating from different environmental, biological, and anthropogenic sources. Volume highlights include: Overview of marine soundscapes and their sources Existing and new methods for studying acoustic signals Case studies from around the world Spans disciplines from geology and geophysicists to biology Explores the impacts and implications of marine noise The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Introduction: Which waveforms (Natural events of a geologic origin that are not related to faults: SDE's, non-volcanic tremors, gas bubbles; Natural events of a biologic origin: Fish bumps, marine mammal calls; Anthropologic noise: Ship noise, car noise, ambient noise etc) This will include an introduction to earthquake seismology in order to explain the differences between the non-tectonic events discussed in this document and earthquakes related to tectonic movements Natural events of a geologic origin Short duration events and pockmark formation (North Sea) Short duration events and resonance of vertical fluid migration conduits (ie Non-volcanic tremors such as in mud volcanoes (Taiwanese mud-volcanoes) Gas Bubbles (much higher frequency, seen only on hydrophones, Events related to hydrothermal circulation Volcanic Tremors: Short duration events related to seismo-volcanic activity (SDE's off Mayotte) Landslides: a review paper Natural events of a biologic origin Whale calls and whale tracking in the Ocean Marine mammal calls detection Anthropogenic noise Noise from marine traffic Car tracking using fibre optic cables at sea Ambient noise Low frequency noise generated by waves and tides (used for approaching the physical properties of the sub-seafloor or) Noise from precipitations Iceberg noise Conclusion