lava dome


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lava dome

[′lä·və ‚dōm]
(geology)
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The lightweight portable instrument measures where activity is greatest on the lava dome surface, helping predict where new explosions might occur.
Volcanologist Devy Kamil Syahbana said Tuesday that the chunk, known as the "lava dome," had a volume of at least 1.6 million cubic meters (56.5 million cubic feet).
14, Mayon volcano has been under Alert Level 3 after Phivolcs observed lava spewing out of its crater and the presence of a new lava dome. After more than a week, the volcano was still exhibiting the same level of unrest and eruption, until early this week, when it shot lava some 700 meters into the sky.
Authorities continue to remain on high alert for the possible eruption of Mayon Volcano "within weeks or even days," as Alert Level 3 remains in effect over the area.READ:Mayon gets facelift with new lava dome"Currently, the Miisi lava flow has advanced to approximately three kilometers from the summit crater, well within the Permanent Danger Zone," the report read, referring to a 6-kilometer area around the volcano.
"Mayon's summit crater is now exhibiting bright crater glow that signifies the growth of a new lava dome and beginnings of lava flow towards the southern slopes," the Philippine Institute of Volcanology and Seismology (Phivolcs) said.
EST), which raised the alert level, DOSAT's Philippine Institute of Volcanology and Seismology (PIVS) said: "After three (3) phreatic (steam-driven) eruptions and 158 rockfall events between 4:21 PM 13 January and 7:25 PM 14 January, Mayon's summit crater is now exhibiting bright crater glow that signifies the growth of a new lava dome and beginnings of lava flow towards the southern slopes."
The thermal baths in Saturina are made of several springs, coming from Mount Amiata, which is the largest of the lava domes in the Amiata lava dome complex B to the hills of Albenga and Fiora, reaching Roselle and Talamone on the west coast of central Italy.
Thus far, the technique has imaged the conduit structure beneath a lava dome at Usu volcano, Japan, (6,14) degassing phenomena in conduits at Satsuma-Iwojima volcano, Japan, (4) explosions of deposits at the crater floor at Asama volcano, Japan, (3) three-dimensional conduit shapes at Asama volcano, Japan, (2) the steam pathway inside a lava dome at La Soufriere of Guadeloupe volcano, France, (11) lava dome formations at Puy de Dome, France, (15) and the conduit geometry at Etna volcano, Italy.
"The growing size of the lava dome is very unstable," said Surono, adding that smouldering rocks mixed with hot gases could tumble down at any time.
Authorities said this week that a lava dome is growing inside the crater and could cause further eruptions.