A Dictionary of Geology and Earth Sciences

‘can really claim to offer comprehensive coverage of the earth sciences’ TES Over 10,000 entries This leading dictionary covers all areas of geoscience, including planetary science, oceanography, palaeontology, mineralogy, and volcanology. In this edition, 675 new entries have been added and include expanded coverage of planetary geology and Earth-observing satellites. The entries are complemented by more than 130 diagrams and numerous web links, while appendices supplement the A–Z and have been extended to include three new tables on the Torino Impact Hazard Scale, Avalanche Classes, and the Volcanic Explosivity Index. It is an essential, authoritative, and jargon-free resource for students of geology, geography, geosciences, physical science, and related disciplines.

Are We Prepared for the Next Mega Eruption?

The frequency of eruptions with a Volcanic Explosivity Index of 7 is only one or two per thousand years but we cannot afford to be complacent.

Predicting the probability of Mount Merapi eruption using Bayesian Event Tree_Eruption Forecasting

Mount Merapi is one of the active volcanoes in Indonesia that had varied eruption periods from two to eight years. Due to the density of the population living around the slopes of Mount Merapi, its eruptions caused high number of victims. In order to avoid high number of victims, the disaster management should be improved. Disaster management consist of four phases i.e. mitigation, preparedness, response and reconstruction. In disaster mitigation phase, prediction of the Merapi unrest probability is needed. This paper focus on how to predict the probability of Merapi unrest based on volcano-logical information by using Bayesian Event Tree. Bayesian Event Tree (BET) is a probabilistic model that merges all kinds of volcano-logical information to obtain probability of any relevant volcanic event. The result showed that the probability of Merapi unrest is 0,822. In the next eruption, it has predicted that the volcanic explosivity index (VEI) 2 was biggest chance with the probability of 0,549. It showed that the eruption will take place in the main crater of Merapi with the probability of 0,938.