View of Semeru  and Bromo  eruption with Mount Batok  in East Java  The Indonesian  island of Java  is almost entirely of volcanic  origin, and contains numerous volcanoes, 45 of which are considered active volcanoes.  As is the case for many other Indonesian islands, volcanoes have played a vital role in the geological and human history of Java. Indeed, land is created on Java as a result of lava flows, ash deposits, and mud flows (lahars ).  Volcanoes are a major contributor to the immense fertility of Java, as natural erosion transports volcanic material as alluvium  to the island's plains, forming thick layers of fertile sediment. The benefit is not just in the immediate vicinity of the volcano, with fine ash emitted from eruptions being dispersed over wide areas. 
Climbing volcanoes (and other mountains) is increasingly popular. 
 
List of volcanoes  Mount Merapi  (left foreground) and Merbabu  (right); with far view of Mount Ungaran , Sumbing , Sundoro , Dieng , and Slamet  in Central Java This list is of volcanoes from the west of Java to the east.  Local terminology and usage has the word Gunung  (mount or mountain ) precede the names. 
 
West Java   
Central Java   
East Java   
List of active volcanoes     Name   Shape   Elevation   Last eruption (VEI )   Geolocation     m   ft     Pulosari stratovolcano  1,346   4,416   unknown   6°20′31″S  105°58′30″E  /  6.342°S 105.975°E  / -6.342; 105.975     Gunung Karang stratovolcano  1,778   5,833   unknown   6°16′12″S  106°02′31″E  /  6.27°S 106.042°E  / -6.27; 106.042     Kiaraberes-Gagak stratovolcano  1,511   4,957   6 Apr 1939  (1) 6°44′S  106°39′E  /  6.73°S 106.65°E  / -6.73; 106.65     Perbakti stratovolcano  1,699   5,574   unknown   6°45′S  106°41′E  /  6.75°S 106.68°E  / -6.75; 106.68     Salak stratovolcano  2,211   7,254   31 Jan 1938  (2) 6°43′S  106°44′E  /  6.72°S 106.73°E  / -6.72; 106.73     Gede stratovolcano  2,958   9,705   13 Mar 1957  (2) 6°47′S  106°59′E  /  6.78°S 106.98°E  / -6.78; 106.98     Patuha stratovolcano  2,434   7,986   unknown   7°09′36″S  107°24′00″E  /  7.160°S 107.40°E  / -7.160; 107.40     Wayang-Windu lava dome  2,182   7,159   unknown   7°12′29″S  107°37′48″E  /  7.208°S 107.63°E  / -7.208; 107.63     Malabar stratovolcano  2,343   7,687   unknown   7°08′S  107°39′E  /  7.13°S 107.65°E  / -7.13; 107.65     Tangkuban Perahu stratovolcano  2,084   6,837   26 Jul 2019  (1) 6°46′S  107°36′E  /  6.77°S 107.60°E  / -6.77; 107.60     Papandayan stratovolcano  2,665   8,743   11 Nov 2002  (2) 7°19′S  107°44′E  /  7.32°S 107.73°E  / -7.32; 107.73     Kendang stratovolcano  2,608   8,556   unknown   7°14′S  107°43′E  /  7.23°S 107.72°E  / -7.23; 107.72     Kamojang stratovolcano  1,730   5,680   Pleistocene  7°07′30″S  107°48′00″E  /  7.125°S 107.80°E  / -7.125; 107.80     Guntur complex volcano  2,249   7,379   16 Oct 1847  (2) 7°08′35″S  107°50′24″E  /  7.143°S 107.840°E  / -7.143; 107.840     Tampomas stratovolcano  1,684   5,525   unknown   6°46′S  107°57′E  /  6.77°S 107.95°E  / -6.77; 107.95     Galunggung stratovolcano  2,168   7,113   9 Jan 1984  (1) 7°15′00″S  108°03′29″E  /  7.25°S 108.058°E  / -7.25; 108.058     Talagabodas stratovolcano  2,201   7,221   unknown   7°12′29″S  108°04′12″E  /  7.208°S 108.07°E  / -7.208; 108.07     Karaha fumarole  1,155   3,789   unknown   7°07′S  108°05′E  /  7.12°S 108.08°E  / -7.12; 108.08     Cereme stratovolcano  3,078   10,098   1951  6°53′31″S  108°24′00″E  /  6.892°S 108.40°E  / -6.892; 108.40     Slamet stratovolcano  3,432   11,260   1 May 1999  (1) 7°14′31″S  109°12′29″E  /  7.242°S 109.208°E  / -7.242; 109.208     Dieng complex volcano  2,565   8,415   31 Dec 1996  (1) 7°12′S  109°55′E  /  7.20°S 109.92°E  / -7.20; 109.92     Sundoro stratovolcano  3,136   10,289   29 Oct 1971  (2) 7°18′00″S  109°59′31″E  /  7.30°S 109.992°E  / -7.30; 109.992     Sumbing stratovolcano  3,371   11,060   1730  (1) 7°23′02″S  110°04′12″E  /  7.384°S 110.070°E  / -7.384; 110.070     Ungaran stratovolcano  2,050   6,730   unknown   7°11′S  110°20′E  /  7.18°S 110.33°E  / -7.18; 110.33     Telomoyo stratovolcano  1,894   6,214   unknown   7°22′S  110°24′E  /  7.37°S 110.40°E  / -7.37; 110.40     Merbabu stratovolcano  3,145   10,318   1797  (2) 7°27′S  110°26′E  /  7.45°S 110.43°E  / -7.45; 110.43     Merapi stratovolcano  2,968   9,738   28 Mar 2020  (3) 7°32′31″S  110°26′31″E  /  7.542°S 110.442°E  / -7.542; 110.442     Muria stratovolcano  1,625   5,331   160  ± 30 years 6°37′S  110°53′E  /  6.62°S 110.88°E  / -6.62; 110.88     Lawu stratovolcano  3,265   10,712   28 Nov 1885  (1) 7°37′30″S  111°11′31″E  /  7.625°S 111.192°E  / -7.625; 111.192     Wilis stratovolcano  2,563   8,409   unknown   7°48′29″S  111°45′29″E  /  7.808°S 111.758°E  / -7.808; 111.758     Kelud stratovolcano  1,731   5,679   13 Feb 2014  (4) 7°55′48″S  112°18′29″E  /  7.93°S 112.308°E  / -7.93; 112.308     Kawi -Butak stratovolcano  2,651   8,698   unknown   7°55′S  112°27′E  /  7.92°S 112.45°E  / -7.92; 112.45     Arjuno -Welirang stratovolcano  3,339   10,955   15 Aug 1952  (0) 7°43′30″S  112°34′48″E  /  7.725°S 112.58°E  / -7.725; 112.58     Penanggungan stratovolcano  1,653   5,423   unknown   7°37′S  112°38′E  /  7.62°S 112.63°E  / -7.62; 112.63     Malang Plain maar  680   2,230   unknown   8°01′S  112°41′E  /  8.02°S 112.68°E  / -8.02; 112.68     Semeru stratovolcano  3,676   12,060   1967 –2021 continuing (3) 8°06′29″S  112°55′12″E  /  8.108°S 112.92°E  / -8.108; 112.92     Tengger stratovolcano  2,329   7,641   8 Jun 2004  (2) 7°56′31″S  112°57′00″E  /  7.942°S 112.95°E  / -7.942; 112.95     Lamongan stratovolcano  1,651   5,417   5 Feb 1898  (2) 7°58′44″S  113°20′31″E  /  7.979°S 113.342°E  / -7.979; 113.342     Lurus complex volcano  539   1,768   unknown   7°44′S  113°35′E  /  7.73°S 113.58°E  / -7.73; 113.58     Iyang-Argapura complex volcano  3,088   10,131   unknown   7°58′S  113°34′E  /  7.97°S 113.57°E  / -7.97; 113.57     Raung stratovolcano  3,332   10,932   3 Oct 2020  (1) 8°07′30″S  114°02′31″E  /  8.125°S 114.042°E  / -8.125; 114.042     Ijen stratovolcano  2,799   9,183   28 Jun 1999  (1) 8°03′29″S  114°14′31″E  /  8.058°S 114.242°E  / -8.058; 114.242     Baluran stratovolcano  1,247   4,091   unknown   7°51′S  114°22′E  /  7.85°S 114.37°E  / -7.85; 114.37   
 
 
See also    
References   
 Whitten, T, Soaeriaatmadja, R. E., Afiff, S. A., (editors), The Ecology of Java and Bali , Periplus Editions (HK) Ltd. 1996, Hardcover, 969 pages, ISBN  962-593-072-8