The VEI uses several factors to assign a number, including volume of erupted pyroclastic material (for example, ashfall, pyroclastic flows, and other ejecta), height of eruption column, duration in hours, and qualitative descriptive terms.
They soon learned, however, that the amount of sulfur dioxide gas injected high into the atmosphere (which is not necessarily related to the size of an eruption) was a critical factor in determining the climatic impact of volcanic eruptions.
Today, the VEI is primarily used to estimate the relative size of an explosive eruption.
Widely recognized as the leader in their field, VEI has been building computer and monitor systems for the marine industry for more than 18 years.
VEI offers a complete solution with software, hardware and installation, including video camera integration, navigation, radar, satellite communications, engine monitoring, instrumentation, video matrix switching, and computer networking (both wired and wireless), and much more.
VEI manufactures the SeaPC line of computers to meet all marine applications where normal "marinized" treatments are insufficient or not desired.
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