China uses it for bathing, Sweden and the U.S.A. use heat pumps and Turkey and Iceland use it for district heating.

 A 3-ton slinky loop prior to being covered with soil.  

The three slinky loops are running out horizontally

 with three straight lines returning the end of the

slinky coil to the heat pump



Biomass fired district heating power plant.



  

Country	Production PJ/yr	Capacity GW	Capacity Factor	Dominant applications
China	45.38	3.69	39%	bathing
Sweden	43.2	4.2	33%	heat pumps
USA	31.24	7.82	13%	heat pumps
Turkey	24.84	1.5	53%	district heating
Iceland	24.5	1.84	42%	district heating
Japan	10.3	0.82	40%	bathing (onsens)
Hungary	7.94	0.69	36%	spas/greenhouses
Italy	7.55	0.61	39%	spas/space heating
New Zealand	7.09	0.31	73%	industrial uses
63 others	71	6.8
Total	273	28	31%	space heating

There are three different types of metatypes of eruptions:
Magmatic eruptions: ~ well observed
                               ~ involve the decompression of gas within magma that propels it forward
Pheatomagmatic: ~ driven by the decompression of gas within magma, the direct opposite of the process
                               powering magmatic activity
Phreatic: ~ driven by the superheating of steam via contact with magma
There are also subtypes of eruptions:
Hawian: ~lava flows from the vent in a relitivly gentle, low level eruption
Submarine: ~ lava erupts over an ocean or sea
Strombolian:~ relitively low leved
                   ~ ejects cinder lapilli and lava bombs  at alltitudes of tens to hundreds of meters
Vulcanian: ~ dense cloud of ash
                ~ "like cannon fire"
Surtseyan: ~ takes place in shallow seas or lakes
                ~violent
                ~ caused by risiing basaltic or andesitic magma coming  into contact with aboundant shallow
                    groundwater