Volcanic debris avalanche deposit database-a progress report

Abstract:

Sector collapse events and associated debris avalanche deposits have been documented at many volcanic edifices around the world. In association with VOLGRIPA, a global risk assessment project, a database on these volcanic debris avalanche deposits is currently being constructed and structured for online access. The aims are:(1) to compile the data currently available on volcanic sector collapses and their products,(2) to summarize the state of research in this area, and (3) to make this data available for the scientific community in a format that can be used for a variety of research aims. It will thus provide a useful tool for studies concerning sector collapse processes, debris avalanche runout mechanisms, or volcanic hazard assessments. Parameters included in the database cover general information about the volcano, such as location and type, summit elevation, summit height above surrounding, main volcano composition and eruption types, date of last eruption (if known), etc. General debris avalanche deposit features listed are deposit name, type of transformation during collapse and emplacement, and deposit age. The main database body consists of categories describing in detail deposit statistics (eg area, volume, runout length, drop height, thickness, collapse trigger, runout slope, deposit framework, etc), collapse scar data (shape, length, width, depth, aperture, volume), deposit morphology (hummocks, ridges, margins and levees, toreva blocks, flat areas, lithological domains, runup, faults), deposit shape (lobate, digitate, fan-shaped, elongate, circular; as well as pre-avalanche topography), internal deposit structures (such as block …

Año de publicación:

2008

Keywords:

Fuente:

google