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One suggests that hotspots are due to mantle plumes that rise as thermal diapirs from the core–mantle boundary. [2] The alternative plate theory is that the mantle source beneath a hotspot is not anomalously hot, rather the crust above is unusually weak or thin, so that lithospheric extension permits the passive rising of melt from shallow ...
There is an ongoing discussion about whether the hotspot is caused by a deep mantle plume or originates at a much shallower depth. [3] Recently, seismic tomography studies have found seismic wave speed anomalies under Iceland, consistent with a hot conduit 100 km (62 mi) across that extends to the lower mantle.
The Conservation International reassessed Myers definition of a hotspot and by 1999 criteria for a hotspot developed to be used globally. A hotspot needs 1,500 endemic vascular plant species and a loss of at least 30 percent of its original land. [2] [3] [4] With these criteria, 25 hotspots were identified in 1999 and published in the journal ...
The HawaiĘ»i hotspot is a volcanic hotspot located near the namesake Hawaiian Islands, in the northern Pacific Ocean.One of the best known and intensively studied hotspots in the world, [1] [2] the Hawaii plume is responsible for the creation of the Hawaiian–Emperor seamount chain, a 6,200-kilometer (3,900 mi) mostly undersea volcanic mountain range.
A single or a conjunction of crime concentrations within a study area can make up a crime hotspot. Some of the early works in crime analysis aimed to identify hotspots of crime within big regions. These regions could extend as large as states, counties , a group of counties, cities , neighborhoods and police beats.
[1] [2] HERMIONE scientists study the distribution of hotspot ecosystems, how they function and how they interconnect, partially in the context of how these ecosystems are being affected by climate change [3] and impacted by humans through overfishing, resource extraction, seabed installations (oil platforms, etc.) and pollution.