Animation of the Italy Earthquake’s Seismic Velocity

Video

A “real-time” animation of the seismic (vertical) velocity of Italy’s 5.5 Mw earthquake that hit between the Aquila and Rieti provinces. The second half of the animation shows the whole country and surrounding area.

Real-time indicates that the video reflects how the waves propagated in real-time. It’s neither slowed down not sped up.

Red color indicates relatively higher vertical velocities indicating the ground is moving upwards while the blue color indicates the lower (negative) velocities indicated a downward movement of the ground. Color intensity refers to the magnitude.

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Sound of the Moving Earth

Audio

What do you think an earthquake would sound like if you could hear it?

Here’s a sample (opens in a new tab).

The audio was generate by processing seismic data.

More samples are available on from the source where you can also find the corresponding spectrograms, (i.e. the representation of the frequency content of the signal and how it varies in time).

via Zhigang Peng @ Georgia Institute of Technology

Credit: Peng, Z., C. Aiken*, D. Kilb, D. Shelly, B. Enescu (2012), Listening to the 2011 magnitude 9.0 Tohoku-Oki, Japan earthquake, Seismol. Res. Lett., 83(2), 287-293, doi: 10.1785/gssrl.83.2.287. , and Kilb, D., Z. Peng, D. Simpson, A. Michael and M. Fisher* (2012), Listen, watch, learn: SeisSound video products, Seismol. Res. Lett., 83(2), 281-286, doi: 10.1785/gssrl.83.2.281.

As a follow-up here’s a nice video from USGS

How Earthquakes and Volcanoes Reveal the Beating Heart of the Planet

Link

How Earthquakes and Volcanoes Reveal the Beating Heart of the Planet, via Smithsonian Magazine – Journey to the Center of Earth

breathingearth

Earthquake Seismic Waves modeled using Ifrasound

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Citation: Jacobsen, E. (2016), Seismic wave videos combine sight and sound, Eos, 97, doi:10.1029/2016EO060261. Published on 04 October 2016.

Computer Simulation of an Earthquake at the Hayward fault in California

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An earthquake is the result of a sudden release of “strain” that is built-up between two tectonic boundaries or at a fault line*, usually slipping in opposite directions.

The following video by the California Academy of Sciences shows a computer simulation of an earthquake at the Hayward fault which is one and the most concerning of several faults in California. The most famous fault being the San Andreas fault.

via KQED Science

  • A fault is a fracture in the rocks of Earth’s crust. There three main categories of faults: Strike-slip, dip-slip, & Oblique-slip.

The latest earthquake that hit Lebanon [2014-09-01 @ 004136 & 012515]

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I have just found out that an earthquake has hit Lebanon. I did not feel it but 7 witnesses have reported the earthquake so far.
Details are as follows:

date: 2014-09-01 (July 06 2014)
time: 235011 / 205011 (Beirut / UTC)
depth: 20 km
epicenter: 41.14°N, 36.08°E (61 km NE of Beirut, 20 km NW of Baalbek)
(moment) magnitude Mw: 4.3

source: EMSC

Here’s an interactive map of the epicenter and the witnesses’ locations.
Source: EMSC

The latest two quakes that hit Lebanon [2014-07-06 @ 004136 & 012515]

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 First earthquake

date: 2014-07-06 (July 06 2014)
time: 004136 / 214636 (Beirut / UTC)
depth: 14 km
epicenter: 33.693°N, 35.217°E (facing Saida/Sidon, Lebanon)
(moment) magnitude Mw: 4.1 +/- 0.12

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