Editing East Java (section)

== Geography ==
[[File:The Beauty of Bromo Mountains.jpg|thumb|[[Eastern salient of Java|Eastern Salient of Java]] mountain range view from [[Bromo Tengger Semeru National Park]] at early morning]]

East Java province borders the [[Java Sea]] in the north, the [[Strait of Bali]] in the east, and the Indian Ocean in the south, as well as the [[Central Java]] province in the west. The length of the east–west stretch of about 400&nbsp;km. The width of the stretch of the north–south in the west about 200&nbsp;km, but in the eastern part of narrower by about 60&nbsp;km. [[Madura]] is the largest island in East Java, separated from the mainland Java by the [[Strait of Madura]]. [[Bawean Island]] is located about 150&nbsp;km north of Java. In the east of Madura there are clusters of islands, the easternmost are the [[Kangean Islands]] and the northernmost are the [[Masalembu Islands]]. Off the south coast of Java there are two small islands namely [[Nusa Barong]] and [[Sempu (island)|Sempu Island]].

=== Geology ===
In physiographic of geology, East Java Province can be grouped into three zones: the southern zone (plato), the middle zone (volcanic), and the northern zone (folds). Lowlands and highlands in the middle (of Ngawi, Blitar, Malang, to Bondowoso) has a fairly fertile soil. In the northern part ( Bojonegoro, Tuban, Gresik, to Madura Island) lies the Kapur Utara mountains and the Kendeng mountains which are relatively barren.

In the middle of the province stretch mountain ranges and volcanoes: On the border with Central Java is [[Mount Lawu]] (3,265 metres). Southeast from Madiun is [[Mount Wilis]] (2,169 metres), and Mount Liman (2,563 metres). In the middle of the corridor lies the Anjasmoro mountains with peaks [[Arjuno-Welirang|Mount Arjuno]] (3,339 metres), Mount Welirang (3,156 metres), Mount Anjasmoro (2,277 metres), Mount Kawi (2,551 metres), and [[Mount Kelud]] (1,731 metres); The mountains are located in most Kediri, Blitar, Malang, Pasuruan, Mojokerto and Jombang. The group has the peak of Mount Bromo Tengger (2,329 metres), and Mount Semeru (3,676 metres). [[Mount Semeru]], which is also called Mahameru is the highest mountain in the island of Java. In the easternmost part if the province, there are two groups of mountains: the Iyang mountains with the peak Mount Argopuro (3,088 metres), the Ijen mountains with the peak [[Mount Raung]] (3344 metres) In the south there is a series of hills, that of the south coast of Pacitan, Trenggalek, Tulungagung, Blitar, Malang. the Kapur Selatan mountains is a continuation of a series of the Sewu mountains in Yogyakarta.

=== Water ===
[[File:Frost at Ranu Pani on 4 August 2018 by Susanto Tan.jpg|thumb|[[Classifications of snow|Light snow]] and [[frost]] are common at East Java highlands over 2,000 [[Metres above sea level|meters above sea level]] in middle of year during late night until morning]]

Two of the most important rivers in East Java are the [[Brantas River]] (290&nbsp;kilometres), and the [[Solo River]] (548&nbsp;kilometers). The Brantas River has headwaters on the slopes Mount Arjuno near Batu, and flows through most areas in East Java, like Malang, Blitar, Tulungagung, Kediri, Jombang and Mojokerto. In Mojokerto, the Brantas River split into two: [[Kali Mas]], and Porong; both empty into the Madura Strait. The Solo River has headwaters on the slopes of Mount Lawu which lies on the border between East Java and Central Java, and flows through a portion of the eastern part of Central Java and East Java, which eventually empties into the sea at Gresik. The Brantas River and Bengawan Solo are managed by Perum Jasa Tirta I. On the slopes of Mount Lawu near the border with Central Java are Sarangan, a natural lake. The main dam in East Java, among others Ir. Sutami and Selorejo Dam, which is used for irrigation, fish farming and tourism.

=== Climate ===
East Java has a [[Tropical monsoon climate|tropical monsoon]] and [[Tropical savanna climate|savanna]] climate at lower elevation and [[Oceanic climate#Subtropical highland variety (Cfb, Cwb)|subtropical at higher elevation]]. Compared with the western part of Java Island, East Java in general has less rainfall. Average rainfall is 1,900&nbsp;mm per year, with a rainy season during the 100 days. The average temperature ranges between 19–34&nbsp;°C. Temperatures in the lower mountain areas, and even in areas Ranu Pani (slopes of Mount Semeru), temperatures can reach –4&nbsp;°C, causing a frost and fall of light snow.<ref>{{Cite web |url=https://www.msn.com/id-id/travel/ideperjalanan/12-fakta-ranupani-desa-di-kaki-semeru-yang-suhu-udaranya-saat-ini-capai-minus-4-derajat-celcius/ar-BBL4Cmv |title=12 Fakta Ranupani, Desa di Kaki Semeru yang Suhu Udaranya Saat Ini Capai Minus 4 Derajat Celcius |website=MSN |language=id-ID |access-date=2018-09-26 |archive-date=26 September 2018 |archive-url=https://web.archive.org/web/20180926205658/https://www.msn.com/id-id/travel/ideperjalanan/12-fakta-ranupani-desa-di-kaki-semeru-yang-suhu-udaranya-saat-ini-capai-minus-4-derajat-celcius/ar-BBL4Cmv |url-status=dead }}</ref>