Mt. Rinjani Data from USGS ( United State Geology Survey )
Sub region Name: Lesser Sunda Islands (Indonesia)
Volcano Number: 0604-03=
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 2010
Summit Elevation: 3726 m 12,224 feet
Latitude: 8.42°S 8°25'0"S
Longitude: 116.47°E 116°28'0"E
One of the large craters called Lake Segara anak at 2000 meter above sea level is the destination of many pilgrims who make the annual trek up the steep slopes in order to place offerings to the Gods in the lake it's self.
This magnificent crater now holds a new and active volcano, Mount Baru Jari which appeared on this century. On the north side of the lake is a hot spring ( one of 4 Segara anak hot springs found there) which is believe by local to cure disease.
A model for echo tourism in Indonesia, It is trully an unforgetable experience to climb such impressive mountain as Rinjani and the 2 trekking expeditions that offered and the spectacular scenery were contributing factors to Rinjani National Park winning the National Geographic World Tourism Award in 2004.
Starting points for such a trek can begin at Senaru in the North or from Sembalun in the East, this two or three days trek attacks Rinjani from West with a descent to awesome crater lake before again climbing up and out and on to the summit.
The faster more direct route climbing to mount Rinjani summit, which is popular for those tourist that don't wish to spend several days on this trekking expedition, can be attempted from Sembalun climbing up Rinjani's Eastern slopes. This trip does not visit the lake Segara Anak but is it still a breathtaking and magic experience. The Rinjani Summit trekking can do for 1 night 2 days from Sembalun.
Rinjani Trekking Suggestion and Recommendation
If you want more comfortable trekking to mount Rinjani is it possible also to combine your trip with stay in Gili Island or Senggigi, our recommendation take the trekking to Rinjani first and do Relaxing at one of the Gili islands or Senggigi to recovery from attempts the mount and pamper your self at world class Spas offer by the accommodations.
Before joint Rinjani Trekking It's worth to asking your rinjani trekking organizer about their equipment, guide, weather, water consumtion and meals during Rinjani trekking trip, to make sure your trip as you wish and hope.
Most reputable trekking organizer they have their owned camping gears / equipment mostly you will get simmillar as you shown on their website ( by asking them about brand of the gears, quality, etc can tell how professional they are and can tell that you will be taking care by them, other company or some one else), also make sure you will have unlimited water suply from the safe bottle during the Rinjani trekking.
Mount Rinjani Recent activity
Rinjani erupted three times on May 22nd 2010 with activity continuing until early on May 23rd. According to the volcano's official monitoring agency, ash from Mount Barujari has been reported as rising up to two km into the atmosphere and has damaged crops. The volcano is not currently threatening villagers. Lava flowed into the caldera lake, pushing its temperature up from 21°C to 35°C, while smoke spread 12 km.
In February 2010 observers at the Mount Rinjani Observation Post located 12.5 km (4000 feet) NE of Rinjani saw one whitish-colored plume that rose 100 meters (328 ft) from the volcano. Dense whitish plumes (and possibly brown) rose 500 metres (1,640 ft) - 900 metres (2,953 ft) in March 2010 on 26 occasions and as high as 1,500 meters (4,921 ft) in April 2010 on 41 occasions. Plumes seen on 1 and 2 May 2010 were "chocolate" in color and rose a maximum height of 1,600 meters (5,249 ft). From February 2010 through April 2010 seismicity decreased, although the maximum amplitude of earthquakes increased. CVGHM (Center of Volcanology and Geological Hazard Mitigation) also noted that ash eruptions and ejected incandescent material fell within Rinjani caldera, but some ash was blown out of the caldera.
The activity in early 2010 centered about Gunung Barujari a post-caldera cone that lies within the Rinjani's caldera lake of Segara Anak. The Volcanological Survey of Indonesia reported on 1 May 2010, that a column of smoke was observed rising from mount Rinjani "issuing eruptions 1300-1600 meters tall with thick brown color and strong pressure". Their report Evaluasi Kegiatan mount Rinjani of 4 May also stated that on 1 May 2010 at 10:00 four events of Explosive Earthquake were recorded with a maximum amplitude of 6-53 mm and 110 seconds long earthquake, earthquake tremor events with a maximum amplitude of 1 mm and 55 second long duration, 15 Local Tectonic earthquake events and two events of tectonic earthquake. The Volcanic Explosivity Index (VEI) Alert Level was raised to 2 (on a scale of 1-4) on 2 May 2010. Level 1 is "Normal" and Level 2 is "Advisory" with an Aviation Alert color of Yellow-Advisory. Based on analysis of satellite imagery, the Darwin VAAC (Volcanic Ash Advisory Center) reported that on 5 May a possible ash plume from Rinjani rose to an altitude of 5.5 km (18,000 ft) a.s.l. and drifted 150 km NW. The plume was not seen in imagery about six hours later. CVGHM (Center of Volcanology and Geological Hazard Mitigation) advised the VAAC that intermittent activity could produce ash plumes to 1.5 km (5,000 ft) above the caldera.
On 27 April 2009 Gunung Barujari became active with activity continuing through to May 2009. The mountain was closed at that time as the eruptions intensified with plumes of smoke and ash as high as 8,000 m (26,250 ft). A Volcanic Explosivity Index (VEI):2 rating was issued for the activity between 2 May 2009 and 20 December 2009. The activity during this period was described as having the characteristics: of central vent eruption, flank (excentric) vent, explosive eruption and lava flows.
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