英文關鍵字
activity
area
basalt
black
caldera
crater
crevices
disaster
eruption
fissures
force
fumaroles
gases
geology
geyser
hell
iceland
krafla
leirhnjaordm
kur
magma
natural
nature
northern
scenery
steam
stone
system
tectonic
travel
traveling
view
volcanic
volcano
volcanology