Short-duration infrasound signals observed at the array PVCI
- 1The Czech Academy of Sciences, Institute of Atmospheric Physics , Prague 4, Czechia (tersin@ufa.cas.cz)
- 2Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
We present the most interesting cases from observations of short-duration infrasound signals at the array PVCI (50.53°N 14.57°E). The array is equipped with three sensors and it has an aperture of 200 m. The optimum detection range of the array is 0.02-4 Hz.
On 24 August 2016 at 01:36:32 UTC, a strong earthquake occurred in Central Italy; the epicentre was located at 42.75°N and 13.22°E. The azimuth from PVCI to the epicentre was 187° and the distance was 871 km. At 02:23-02:40 UTC, signals from the azimuths around 195° were recorded at the array. The time interval corresponds to the expected stratospheric signal arrival.
On 3 March 2016 at 21:51-21:53 UTC, PVCI registered signal from the azimuth of 199°. The signal elevation was 30-35°. We assume that the signal source was the bolide EN060316 that entered the atmosphere above Upper Austria and Bavaria.
Two large accidental explosions occurred in the region recently; both of them were recorded by PVCI and other member stations of the CEEIN network. On 26-27 September 2017, an ammunition depot exploded in Kalynivka, Central Ukraine. Signals from the azimuths of 85-90° were recorded on 26 September 2017 at 21:02-21:05 UTC and at 23:16-23:21 UTC. On 1 September 2018 around 03:15 UTC, an explosion occurred in the refinery near Ingolstadt, Germany. A high amplitude signal arrived at PVCI at 03:30:48 UTC from the azimuth of 243°.
How to cite: Sindelarova, T., Czanik, C., Kozubek, M., Podolska, K., Base, J., and Kouba, D.: Short-duration infrasound signals observed at the array PVCI, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-2582, https://doi.org/10.5194/egusphere-egu2020-2582, 2020.
