Uson

An uson iyo an sarong marikas na sulog nin mainit na gas asin bulkanikong bagay (kolektibong midbid sa apod na tephra) na minabolos sa daga parayo sa bulkan sa promedyong rikas na 100 km/h (30 m/s) alagad kayang aboton an rikas na sagkod sa 700 kilometros (190 metros)(~435 mph).^[1] An mga gas asin tephra pwede makaabot sa temperatura nin mga 1,000 °C (1,800 °F).

An uson iyo an pinakanakakagadan sa gabos na peligro nin bulkan asin pinoprodusir bilang resulta kan nagkapirang eksplosibong pagtuga; normalmente iyan nakaduta sa daga asin nakakakolog, o naglakop sa huri sa paagi kan grabidad.^[2] An saindang rikas depende sa densidad kan kan sulog, bulkanikong output rate, asin an gradient kan bakilid.

↑ Branney M.J. & Kokelaar, B.P. 2002, Pyroclastic Density Currents and the Sedimentation of Ignimbrites. Geological Society of London Memoir 27, 143pp.
↑ Auker, Melanie Rose; Sparks, Robert Stephen John; Siebert, Lee; Crosweller, Helen Sian; Ewert, John (2013-02-14). "A statistical analysis of the global historical volcanic fatalities record". Journal of Applied Volcanology 2 (1): 2. doi:10.1186/2191-5040-2-2. ISSN 2191-5040.

[1] Branney M.J. & Kokelaar, B.P. 2002, Pyroclastic Density Currents and the Sedimentation of Ignimbrites. Geological Society of London Memoir 27, 143pp.

[2] Auker, Melanie Rose; Sparks, Robert Stephen John; Siebert, Lee; Crosweller, Helen Sian; Ewert, John (2013-02-14). "A statistical analysis of the global historical volcanic fatalities record". Journal of Applied Volcanology 2 (1): 2. doi:10.1186/2191-5040-2-2. ISSN 2191-5040.

[1]

[2]