Earthquakes
The ground failing. Faults and how they rupture, seismology and the seismograph, the big ones from Lisbon to Tōhoku, early-warning systems, building codes and what survives, and the search-and-rescue work in the first seventy-two hours.
Part of Underground
38 moments in this segment.
- - How Plate Tectonics Was Discovered. A 1970 documentary laying out the evidence that convinced geologists to adopt plate tectonics as the unifying theory of Earth.
- - Waverly Person, USGS seismologist. Waverly Person, who for decades headed the US Geological Survey's National Earthquake Information Center and became the public voice explaining earthquakes detected from deep within the Earth.
- - SeismographLomaPreitaQuakeSeismologistSmile. Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Seismographs at the U.S. Geological Survey record the north-south horizontal, east-west horizontal, and vertical components of the ear.
- - Seismic Imaging of the Earth's Interior. Barbara Romanowicz on using seismic tomography to map the deep structure and dynamics of the planet.
- - Han Earthquake-detecting Machine Model - 2. Henan Provincial Museum, Zhengzhou. Complete indexed photo collection at WorldHistoryPics.com.
- - Inside the BGS Seismology Lab. Dr Brian Baptie introduces the British Geological Survey's earthquake monitoring work from the Edinburgh seismology laboratory.
- - Estación sísmica en Timanfaya- Lanzarote- Illas Canarias- Spain-T16. Seismometer, Natural Park of Timamfaya, Lanzarote, Spain.
- - Shale Gas, Hydraulic Fracturing and Induced Earthquakes. A USGS public lecture separating the evidence on injection-induced seismicity from the surrounding noise.
- - Induced Seismicity and Shale Gas. Professor Peter Styles of Keele University addresses the Geological Society on earthquakes caused by fracking.
- - Seismology 101. Caltech's short primer on how seismologists read the waves that pass through the planet.
- - Acelerógrafo del Laboratorio de Ingenería Sísmica de la Universidad de Costa Rica
- - General Seismology. Goran Ekstrom's long-form lecture on seismology as the discipline that reads Earth's interior.
- - CMG-40T Triaxial Broadband Seismometer. Triaxial Broadband Seismometer model CMG-40T by Güralp Systems Limited at Weston Observatory in Massachusetts, USA.
- - Instruments for Students at Weston Observatory. Seismometer and other instruments for science education and public outreach.
- - The Layers of the Earth and Who Found Them. IRIS on how crust, mantle and core were each identified, and the difference between crust and tectonic plate.
- - 59 optical electromagnetic seismograph-1. Japan Meteorological Agency 59 Formula optical electromagnetic seismometer.
- - 59 optical electromagnetic seismograph-0. Japan Meteorological Agency 59 Formula optical electromagnetic seismometer.
- - Good Vibrations Inside the Earth. A Caltech lecture on reading the planet's interior from the vibrations that pass through it.
- - Jeff Hungerford - Park geologist deploys a remote nodal seismometer from the boardwalk on. Photograph showing jeff hungerford - park geologist deploys a remote nodal seismometer from the boardwalk on.
- - Arduino based Seismometer. Scientific instrument which is an Arduino based Seismometer motherboard under development, based on 3-axis accelerometer (orange circuit board).
- - What Is the Moho, and How Was It Found?. IRIS explains the Mohorovicic discontinuity, the crust-mantle boundary recognised from a change in seismic wave velocity.
- - Icons in Discovery: Inge Lehmann. The American Geophysical Union on Lehmann's 1936 discovery of Earth's solid inner core from seismic shadow-zone arrivals.
- - The Earth's Mantle Is Nothing Like You Thought. Why the neat layer-cake diagram of Earth's interior is wrong, and what the mantle is actually doing.
- - Installing a temporary seismometer. Photo (L-R) Jose Cancel of Puerto Rico Seismic Network (PRSN), Alena Leeds of USGS and Javier Santiago of PRSN install a temporary seismometer at Sabana Yeguas in southwestern Puerto Rico on Jan. 10.
- - Reading the Cascadia Subduction Zone in the Landscape. An IRIS animation narrated by Nick Zentner on the surface features that record what the subduction zone is doing at depth.
- - What Does the Core of the Earth Look Like?. Seismologist Arwen Deuss images the Earth's interior using earthquake waves, visiting Vesuvius and Inge Lehmann's old Danish measuring station.
- - Planetary Seismology: Three Years on Mars. The InSight team on continuous seismic recording on Mars, the heat-flow probe that would not bury itself, and plans to return seismometers to the Moon.
- - Ultra-Low Velocity Zones at the Core-Mantle Boundary. Samantha Hansen on the small, strange patches at the base of the mantle where seismic waves slow dramatically.
- - Probing the Inner Core with Quakes and Blasts. Science magazine on how seismologists use earthquakes and nuclear-test blasts to study the Pluto-sized solid iron inner core that powers the magnetic field.
- - Forty Years of Learning About Earth's Interior. Barbara Romanowicz reviews what four decades of seismology have established about the deep planet, for the Seismological Society of America.
- - The Imminent Megaquake in the Pacific Northwest. University of Oregon researchers on the 26 January 1700 Cascadia earthquake, recorded by a tsunami in Japan and by drowned coastal forests.
- - The Graveyard at the Center of the Earth. PBS Eons on the slabs of subducted ocean floor that sink to the core-mantle boundary and pile up there.
- - Cascadia: Why the Risk Estimate Keeps Getting Worse. PBS Terra on newer research into the Cascadia megathrust and what it changes about the expected rupture.
- - Are Cascadia and the San Andreas Linked?. Chris Goldfinger presents evidence for partial synchronisation between ruptures of the northern San Andreas fault and the Cascadia megathrust.
- - "Сейсмограф" Seismometer in Moscow Institute of Physics and Technology 20260330 133932. Seismometer in Moscow Institute of Physics and Technology This photo was created by Lesless. It is not in the public domain, and use of this file outside of the licensing terms is a copyright violati.
- - The Cascadia Megaquake Is Inevitable. PBS Terra on the Cascadia Subduction Zone, the offshore fault running hundreds of miles along the Pacific Northwest and overdue for a magnitude 9 rupture.
- - What Are Induced Earthquakes?. A primer from a hydrogeology lab on earthquakes triggered by injecting fluid into the subsurface.
- - A Seismic View of Mars, From Crust to Core. Ross Maguire on the more than 1,000 marsquakes InSight recorded between 2018 and 2022 and what they reveal about a single-plate planet's interior.
