In particular, the concept that mantle plumes are fixed relative to one another, and anchored at the core-mantle boundary, was thought to provide a natural explanation for the time-progressive chains of older volcanoes seen extending out from some " hot spots ".

A special episode featuring a vacation trip to the Bahamas focuses on Magma in particular ; during this trip, Magma's association with volcanoes is clearly emphasized.

The Maccalube ( from " maqlub ", a land that turns ) are a particular and rare phenomenon of sedimentary volcanism occurring in the area of Caltanissetta Terrapelata, the so-called " Hill of the volcanoes ".

In particular, adaptive optics imaging from the Keck telescope in Hawaii and imaging from the Hubble telescope have allowed astronomers to monitor Io's active volcanoes.

It has applications for geophysical monitoring of natural hazards, for example earthquakes, volcanoes and landslides, and also in structural engineering, in particular monitoring of subsidence and structural stability.

) However, it is more proper to realize that all of the eruptive centers of Krakatau have a common source and that we are talking about particular cones of the same volcano, rather than separate volcanoes.

It contains an audio / visual display of volcanoes in general, and the eruptions and lava flows of the district in particular.

The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior ( IAVCEI ) as being worthy of particular study in light of their history of large, destructive eruptions and proximity to populated areas.

Decade Volcanoes are volcanoes identified by the International Association for Volcanology and Chemistry of the Earth's Interior ( IAVCEI ) as worthy of particular study in light of their history of large eruptions and proximity to populated areas.

That eruption, in particular, led to the recognition of base surge ( one of the American geologists who witnessed an atomic bomb explosion as a soldier and visited the volcano shortly after the 1965 eruption, compared it to an atomic base surge ) as a process in volcanic eruption, which are now called pyroclastic surges when relating to volcanoes.

Several volcanoes on offshore islands have records of historic activity.

More than 80 of these large shield volcanoes have summit calderas averaging 60 km across.

The country has over twenty volcanoes, although only two, San Miguel and Izalco, have been active in recent years.

Logan is believed to have the largest base circumference of any non-volcanic mountain on Earth ( a large number of shield volcanoes are much larger in size and mass ), with the massif containing eleven peaks over.

There are no active volcanoes ( aside from Baekdu Mountain on the border between North Korea and China, most recently active in 1903 ), and there have been no strong earthquakes.

Sicily and its small surrounding islands have some highly active volcanoes.

Some volcanoes have rugged peaks formed by lava domes rather than a summit crater, whereas others present landscape features such as massive plateaus.

The flanks of some volcanoes are believed to have been exposed to rainfall because they resemble those caused on Hawaiian volcanoes.

Basaltic tuffs are also of wide spread occurrence both in districts where volcanoes are now active and in lands where eruptions have long since ended.

Terrestrial planets can have canyons, craters, mountains, and volcanoes.

The central highlands, which range from in altitude, contain a wide variety of topographies: rounded and eroded hills, massive granite outcrops, extinct volcanoes, eroded peneplains, and alluvial plains and marshes, which have been converted into irrigated rice fields.

< p > In another place, this learned geographer, in alluding to the tradition that Sicily had been separated by a convulsion from Italy, remarks, that at present the land near the sea in those parts was rarely shaken by earthquakes, since there were now open orifices whereby fire and ignited matters and waters escaped ; but formerly, when the volcanoes of Etna, the Lipari Islands, Ischia, and others, were closed up, the imprisoned fire and wind might have produced far more vehement movements.

Klyuchevskaya's first recorded eruption occurred in 1697, and it has been almost continuously active ever since, as have many of its neighboring volcanoes.

All of the known historic eruptions in the contiguous United States have been from either Cascade volcanoes or near Mono Lake.

Alternatively, the biblical descriptions of Sinai can be interpreted as describing a volcano, and so a small number of scholars have considered equating Sinai with locations in northwestern Saudi Arabia ; there are no volcanoes in the Sinai Peninsula.

Java is almost entirely of volcanic origin ; it contains thirty-eight mountains forming an east-west spine which have at one time or another been active volcanoes.

All of the eruptions in the contiguous United States over the last 200 years have been from Cascade volcanoes.

Since Roman times similar features on Earth have been known as volcans, volcanes and volcanoes.

Ka ' u farmers and Pahala residents have recently been plagued by the ill-effects of sulfur-dioxide laden " vog ", due to the area's proximity to the very active volcanoes at Hawaii Volcanoes National Park.

Hekla is one of Iceland's most active volcanoes ; over 20 eruptions have occurred in and around the volcano since 874.

In recorded history, explosive eruptions at subduction zone ( convergent-boundary ) volcanoes have posed the greatest hazard to civilizations.

As mudflows sweep down the steep sides of composite volcanoes, they have the strength and speed to flatten or bury everything in their paths.

In recent years, geologists have confirmed that a number of seamounts are active undersea volcanoes ; two examples are Lo ‘ ihi in the Hawaiian Islands and Vailulu ' u in the Manu ' a Group ( Samoa ).

It has been hypothesized that periodic methane eruptions ( sometimes called " mud volcanoes ") may produce regions of frothy water that are no longer capable of providing adequate buoyancy for ships.

About 50 million years ago, this fast moving Indo-Australian plate had completely closed the Tethys Ocean, the existence of which has been determined by sedimentary rocks settled on the ocean floor, and the volcanoes that fringed its edges.

It had been thought that these bright areas might be material ejected from ice volcanoes early in Rhea's history when its interior was still liquid.

It has been theorised that the volcanoes were formed by the Bermuda hotspot, if that existed.

They were deposited in the Devonian and Carboniferous eras in a sea characterised by island chains, volcanoes and atolls that were pushed together and covered by a layer of rock that had been transported from another location during the Variscan orogeny period of mountain building.

He seems to have been enamored of the idea ( scientifically unproven ) that volcanoes and earthquakes are more likely to be triggered when the tidal force of the sun and the moon coincide to exert maximum stress on the earth's crust.

Herschel attributed the phenomena to erupting volcanoes and perceived the luminosity of the brightest of the three as greater than the brightness of a comet that had been discovered on April 10.

These have been common on the submerged flanks of ocean island volcanoes and more can be expected in the future.

In areas on or near volcanoes, flash floods have also occurred after eruptions, when glaciers have been melted by the intense heat.

Some of the most spectacular photos have been recorded by the night visual sensor ; city lights, volcanoes, fires, lightning, meteors, oil field burn-offs, as well as the Aurora Borealis and Aurora Australis have been captured by this 450-mile-high space vehicle's low moonlight sensor.

During the past several thousand years, eruptions of the volcanoes in the Ruiz – Tolima massif have mostly been small, and the pyroclastic flow deposits have been much less voluminous than during the Pleistocene.