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Ocean bottom seismometers

We manufacture force-feedback, broadband seismometers, accelerometers and data acquisition systems for a range of research and industrial applications. Installed in networks around the globe, our customers use our instruments to measure natural earthquakes and volcanic eruptions, as well as man-made vibrations and tremors such as those resulting from nuclear tests, energy production or the construction of major infrastructure. Click for more This revolutionary ocean bottom seismometer OBS uses acoustic telemetry capability to deliver near real-time seismic data from the ocean floor to the surface without cables.
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Earth's "hum" heard at ocean bottom | EARTH Magazine

The plates attached to the Americas are moving apart from those attached to Europe and Africa by four centimetres per year. In between these continents lies the Mid-Atlantic Ridge, a site where new plates are formed and a dividing line between plates moving to the west and those moving to the east; beneath this ridge, material rises to replace the space left by the plates as they move apart. Conventional wisdom is that this process is normally driven by distant gravity forces as denser parts of the plates sink back into the Earth. However, the driving force behind the separation of the Atlantic plates has remained a mystery because the Atlantic ocean is not surrounded by dense, sinking plates. Upwellings beneath ridges are typically thought to originate from much shallower depths of around 60 km. The findings, published in the journal Nature provide a greater understanding of plate tectonics which causes many natural disasters around the world, including earthquakes , tsunamis and volcanic eruptions.
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A widening Atlantic Ocean shows the Earth’s pulse

The geology of the Moon sometimes called selenology , although the latter term can refer more generally to " lunar science " is quite different from that of Earth. The Moon lacks a true atmosphere , which eliminates erosion due to weather ; it does not have any known form of plate tectonics , it has a lower gravity , and because of its small size, it cooled faster. The complex geomorphology of the lunar surface has been formed by a combination of processes, especially impact cratering and volcanism.
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IRIS provides management of, and access to, observed and derived data for the global earth science community. Our mission is to advance awareness and understanding of seismology and earth science while inspiring careers in geophysics. IRIS staff and subawardees oversee the construction, operation, and maintenance of seismic networks and related data facilities utilized by a wide sector of the earth science community.
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