Volcanic eruptions observed with infrasound

A Neurocomputing Approach for Monitoring Plinian Volcanic Eruptions Using Infrasound

Plinian volcanic eruptions can inject a substantial amount of volcanic ash and gas into the stratosphere, which can present a severe hazard to commercial air traffic. A hazardous volcanic ash eruption was reported on April 14, 2010, and London’s aviation authority issued an alert that an ash plume was moving from an eruption in Iceland towards northwestern Europe. This eruption resulted in the ...

Volcanic eruptions, lightning, and a waterfall: Differentiating the menagerie of infrasound in the Ecuadorian jungle

[1] In northeastern Ecuador, near Reventador Volcano, the airwaves are filled with infrasound. Here we identify the locations and characterize three distinct sources of local infrasound, including two types of infrasonic sources, which are not commonly discussed in the literature. The first of these novel sources is an intense and continuous radiator with a fixed location corresponding to San R...

The Effects of Thermal and Wind Fields in the Propagation of Infrasonic Waves in the Atmosphere

Omar Marcillo Sound waves traveling at frequencies between 0.05 and 20 Hertz are called infrasound waves. Ocean waves, meteorites (Evers et al., 2001), large earthquakes, and volcanic eruptions (Johnson, 2003) are among the natural phenomena that produce infrasound waves. Nuclear and chemical explosions can also generate infrasound waves. Infrasound waves tend to travel long horizontal distance...

The First Second of Volcanic Eruptions from the Erebus Volcano Lava Lake, Antarctica—Energies, Pressures, Seismology, and Infrasound

Nonlinear synthesis of infrasound propagation through an inhomogeneous, absorbing atmosphere.

An accurate and efficient method to predict infrasound amplitudes from large explosions in the atmosphere is required for diverse source types, including bolides, volcanic eruptions, and nuclear and chemical explosions. A finite-difference, time-domain approach is developed to solve a set of nonlinear fluid dynamic equations for total pressure, temperature, and density fields rather than acoust...