Volcanic activity, earthquakes, loss of habitat, fire, loss of prey due to poaching, tourism, and illegal poaching of the dragons themselves have all contributed to the vulnerable status of the Komodo dragon.

Volcanic activity occurred along the ridges of this arc during the Miocene era and has continued since.

Volcanic activity continues in the Mono Lake vicinity: the most recent eruption occurred 350 years ago, resulting in the formation of Paoha Island.

Volcanic activity became concentrated in the vicinity of the present site of Long Valley Caldera 3. 1 to 2. 5 million years ago with eruptions of rhyodacite followed by high-silica rhyolite from 2. 1 to 0. 8 million years ago.

Volcanic activity was considerably higher than today, with numerous lava eruptions, including unusual types such as komatiite.

The Volcanic Aviation Colour Code was changed because a sustained period of high water temperatures in the Crater Lake ( approximately 38-39 ° C ) was observed and because changes were observed in volcanic gas output, seismic activity and Crater Lake water chemistry.

Volcanic activity in this area is fed by subduction off the coast of Oregon as the Juan de Fuca Plate slips below the North American Plate ( see plate tectonics ).

Lake Nyos lies within the Oku Volcanic Field, located near the northern boundary of the Cameroon Volcanic Line, a zone of volcanoes and other tectonic activity that extends southwest to the Mt.

* Volcanic crater or caldera, formed by volcanic activity

Volcanic activity restarted in 1999, and is ongoing, with major eruptions on 16 August 2006, 6 February 2008, 28 May 2010, 4 December 2010 and 26 April 2011.

Volcanic activity persisted past 5 million years BP east of the current park borders in the Mono Lake and Long Valley areas.

The geology of the Lassen volcanic area presents a record of sedimentation and volcanic activity in the area in and around Lassen Volcanic National Park in Northern California, U. S. The park is located in the southernmost part of the Cascade Mountain Range in the Pacific Northwest region of the United States.

The only activity since then has been the constant bubbling of mud pots and steaming of fumaroles from the various geothermal areas in Lassen Volcanic National Park.

Because of the eruptive activity and the area's stark volcanic beauty, Lassen Peak, Cinder Cone and the area surrounding were designated as the Lassen Volcanic National Park on August 9, 1916.

Several groups of hot springs and fumaroles, remnants of former volcanic activity, exist in Lassen Volcanic National Park.

* Upper Volcanic Complex-represents the main sub-aerial activity composed of three main stratigraphic units, that include basaltic to trachytic flows with inter-bedded pyroclastic deposits in the first two layers, and a more recent unit of exclusively pyroclastic deposits.

Volcanic activity increased throughout May.

The mountain is part of the area of volcanic activity known as the Cameroon Volcanic Line, which also includes Lake Nyos, the site of a disaster in 1986.

* Volcanic plateaus are produced by volcanic activity.

Volcanic activity in the region may be contributing to the observed increase of glacial flow, although currently the most popular theory amongst the scientists studying this area is that the flow has increased due to warming ocean water.

Volcanic activity deposited lava over the area 1. 8 million to 500, 000 years ago.

Ngauruhoe is no longer showing signs of any significant unrest and the Volcanic Alert Level has been reduced to zero ( typical background activity ).

After it enters Lassen Volcanic National Park it continues to gain elevation until it reaches its highest point in an unnamed pass in the middle of Lassen Peak and Bumpass Mountain.

The Basin and Range Province extends southeast down into Chihuahua state in northeast Mexico, and far south along the and south along the Mexican Plateau to central Mexico at the Trans-Mexican Volcanic Belt.

* Volcanic Complex of Calheta de Nesquim-dating to about 230, 000 million years ago, this is a fissural zone of cones and basaltic lavas, associated with the Achada Plain, and the many faults along the central plateau of the island.

This subducting plate system has formed the Cascade Range, the Cascade Volcanic Arc, and the Pacific Ranges, along the west coast of North America from southern British Columbia to northern California.

Particularly notable are the string of parks along the Berkeley Hills above and east of both Berkeley and Oakland, including Wildcat Canyon Regional Park, Tilden Regional Park, Robert Sibley Volcanic Regional Preserve, Huckleberry Botanic Regional Preserve, and Redwood Regional Park.

Volcanic hot springs, bubbling clay pots, and numerous waterfalls and rivers may be found along the park's many kilometres of hiking trails.

The Pacaya volcano is a part of the Central American Volcanic Arc, a chain of volcanoes stretching from the northwest to the southeast along the Pacific coast of Central America, formed by the tectonic subduction of the Cocos Tectonic Plate beneath the Caribbean Plate.

Volcanic activity on the island has been mainly located along three sets of lineaments, which all intersect at the crest of ground that forms the highest part of the island.

This includes the east-west trending Alert Bay Volcanic Belt on northern Vancouver Island and the Pemberton Volcanic Belt along the coastal mainland.

Some centers erupted along pre-existing brittle fault systems while volcanism along its northern portion is most widely believed to have been related to a center of upwelling magma called the Anahim hotspot ( similar to that associated with present day Hawaii ), creating the Rainbow, Ilgachuz and Itcha Range shield volcanoes which also in turn form part of the Anahim Volcanic Belt.

The Cascade Volcanic Arc in western North America and the Andes along the western edge of South America are examples of continental volcanic arcs.

Volcanic lava was emitted along the Ribeira do Almeida and in Santo Amaro, and there was record of a pyroclastic flow that was responsible for the deaths of, at least, 10 people.

The progress of fissural volcanism runs along these accesses, and has resulted in volcanic features that are younger than the rest of the island ; two volcanic complexes have their origin in Velas: the Volcanic Complex of Rosais ( which is less than 10 million years in age ) and the Volcanic Complex of Manadas ( the older system which is between 10 and 600 million years in age ).

Along the western edge of the Ribeirinha Volcano, the Central Volcanic Complex formed about 410, 000 years ago, along with several structures that arose from tectonics.

Capelinhos is located along the Capelo Volcanic Complex, that comprises a western area of fissural volcanism and historical eruptions leading away from the Cabeço do Fogo.

The parish is crossed by several pedestrian hiking trails connecting the volcanic cones along the Capelo Volcanic Complex: Cabeço do Fogo, Cabeço Verde and Cabeço do Canto, as well as interesting geological sites such as Fonte dos Namorados.

The Fuego-Acatenango massif comprises a string of five or more volcanic vents along a north-south trend that is perpendicular to that of the Central American Volcanic Arc in Guatemala.

Volcanic rock occurs in the northwest just east of the Gotel Mountains and northeast of Ngaoundéré, the provincial capital, along the border with the North Province.

Nevados de Quimsachata Volcanic Complex is a-long volcanic group on a north-south alignment along the border between Bolivia and Chile, overseeing Chungara Lake.