Volcanic Craters and Explosions

Craters from Impacts and Explosions

Recent volcanic resurfacing of Venusian craters

Ejecta from impact craters on Venus are a major source of fine-grained materials across the planet, and crater spatial distribution has been studied as a guide to the relative age and resurfacing rates of large regions. Of particular interest is the potential intersection of distal crater deposits and tesserae, highly deformed landforms that may be the oldest materials on Venus. The composition...

Reconstruction Glacier Circus in volcanic craters (Case study Kurdistan Qorveh)

Extended abstract Introduction The attention of forefront foreign researchers has focused on glacier circus. Glacial cirque is the most important pattern of glacial erosion. Deep depressions with steep walls, flat floor or low slope, half-bowl shaped (crescent shaped) are created at high altitudes in the mountains margin by the erosion of mountain glacier (Ahmadi, Feiznia, 2012). Th...

Generation and Propagation of Infrasonic Airwaves from Volcanic Explosions

Analysis of infrasonic pressure waves generated by active volcanoes is essential to the understanding of volcanic explosion dynamics. Unlike seismic waves propagating in the earth, infrasonic airwaves offer a relatively unfiltered representation of source motions at the vent during an eruption. Time-varying acoustic propagation filters caused by changeable atmospheric conditions are minimal for...

Numerical Evaluation of Craters Produced by Explosions on the Soil Surface

Studies of craters produced by explosions above and underneath the ground surface are rarely found in the open technical literature. Most reports are confidential and access is limited to government agencies. Much of the information on explosively formed craters found in the literature is based on experimental data. Numerical studies were very limited until recently. An ablity to predict the an...