Geothermal Activity Boiling Mud Pot, Bubbling, Molten, Volcano, Volcanic, Iceland

Geothermal Activity Fumarole Constant High Intensity Venting of Gas, Steam, Volcano, Volcanic, Iceland

Geothermal Steam Vents, Iceland, Constant Roar, Exterior

Thermal Mud Pots, Bubbles Boil, Plops, Goop, Wet, Hot, Iceland

Lava Rumble, Landslide, Thick, Rumbling, Rocks, Violent, Eruptive, Active

Lava Presence, Constant, Deep Heavy Bubbling, Steam, Heavy Sizzling, Splashing, Rumbling, Air Releases, Very Active

Distant Lava, Rumbling, Flowing, Liquid Movement, Gravel Debris, Churning, Dying Out at Tail

Distant Lava Presence, Constant, Rumbling, Bubbling, Airy Reverberant Hum, Echoing Out at Tail

Volcano Eruptions, Lava, Interior

Lava Flow. Lava Flowing Into Sea, Steam, Surf And Lava Breaking Up. NB: Exact Date Of Recording Not Known. Hawaii