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April 30 is the 120th day of the year in the Gregorian calendar; 245 days remain until the end of the year.
Lake Toba is a large natural lake in North Sumatra, Indonesia, occupying the caldera of a supervolcano. The lake is located in the middle of the northern part of the island of Sumatra, with a surface elevation of about 900 metres (2,953 ft), the lake stretches from 2.88°N 98.52°E to 2.35°N 99.1°E. The lake is about 100 kilometres long, 30 kilometres (19 mi) wide, and up to 505 metres (1,657 ft) deep. It is the largest lake in Indonesia and the largest volcanic lake in the world. Toba Caldera is one of twenty geoparks in Indonesia, and was recognised in July 2020 as one of the UNESCO Global Geoparks.
Makian, known to local people as Mount Kie Besi, is a volcanic island, one of the Maluku Islands within the province of North Maluku in Indonesia. It lies near the southern end of a chain of volcanic islands off the western coast of the province's major island, Halmahera, and lies between the islands of Moti and Tidore to the north and Kayoa and the Bacan Group to the south. The island, which forms two districts within South Halmahera Regency of North Maluku Province, covers an area of 84.36 sq.km, and had a population of 12,394 at the 2010 Census, which rose to 14,000 at the 2020 Census. The official estimate as at mid 2022 was 13,833.
The Bromo, or Mount Bromo is an active somma volcano and part of the Tengger mountains, in East Java, Indonesia. At 2,329 meters (7,641 ft) it is not the highest peak of the massif, but is the most active and famous. The area is one of the most visited tourist destinations in East Java, and the volcano is included in the Bromo Tengger Semeru National Park. The name Bromo comes from the Javanese pronunciation of Brahma, the Hindu god of creation. At the mouth of the crater, there is an idol of Ganesha, the Hindu god of wisdom which is being worshipped by the Javanese Hindus. Mount Bromo is located in the middle of a plain called "Sea of Sand", a nature reserve that has been protected since 1919.
Mount Sibayak is a stratovolcano overlooking the town of Berastagi in northern Sumatra, Indonesia. Although its last eruption was more than a century ago, geothermal activity in the form of steam vents and hot springs remains high on and around the volcano. The vents produce crystalline sulfur, which was mined on a small scale in the past. Seepage of sulfurous gases has also caused acidic discolouration of the small crater lake.
The Bukit Barisan or the Barisan Mountains are a mountain range on the western side of Sumatra, Indonesia, covering nearly 1,700 km (1,050 mi) from the north to the south of the island. The Bukit Barisan range consists primarily of volcanoes shrouded in dense jungle cover, including Sumatran tropical pine forests on the higher slopes. The highest peak of the range is Mount Kerinci at 3,800 metres (12,467 ft). The Bukit Barisan Selatan National Park is situated towards the southern end of the range in Liwa, Indonesia.
Mount Merapi is an active stratovolcano located on the border between the province of Central Java and the Special Region of Yogyakarta, Indonesia. It is the most active volcano in Indonesia and has erupted regularly since 1548. It is located approximately 28 km (17 mi) north of Yogyakarta city which has a population of 2.4 million, and thousands of people live on the flanks of the volcano, with villages as high as 1,700 m (5,577 ft) above sea level.
Mount Agung is an active volcano in Bali, Indonesia, southeast of Mount Batur volcano, also in Bali. It is the highest point on Bali, and dominates the surrounding area, influencing the climate, especially rainfall patterns. From a distance, the mountain appears to be perfectly conical. From the peak of the mountain, it is possible to see the peak of Mount Rinjani on the nearby island of Lombok, to the east, although both mountains are frequently covered in clouds. Agung is a stratovolcano, with a large and deep crater. Its most recent eruptions occurred from 2017–2019.
Mount Rinjani is an active volcano in Indonesia on the island of Lombok. Administratively the mountain is in the Regency of North Lombok, West Nusa Tenggara. It rises to 3,726 metres (12,224 ft), making it the second highest volcano in Indonesia. It is also the highest point in the Indonesian province of West Nusa Tenggara.
Mount Talang (2,597 m [8,520 ft]) is an active stratovolcano in West Sumatra, Indonesia. Talang has two crater lakes on its flanks, the largest of which is 1 by 2 kilometres wide and is called Lake Talang.
The Semeru, or Mount Semeru is an active volcano located in East Java, Indonesia. It is located in a subduction zone, where the Indo-Australian plate subducts under the Eurasia plate. It is the highest mountain on the island of Java. The name "Semeru" is derived from Meru, the central world mountain in Hinduism, or Sumeru, the abode of gods. This stratovolcano is Mahameru, meaning "The Great Mountain" in Sanskrit. It is one of the more popular hiking destinations in Indonesia.
The Marapi, or Mount Marapi, is a complex volcano in West Sumatra, Indonesia, and is the most active volcano in Sumatra. Like that of its quasi-homonym on Java, its name means "Mountain of Fire". Its elevation is 2,885 metres (9,465.2 ft). Several cities and towns are situated around the mountain including Bukittinggi, Padang Panjang, and Batusangkar. The volcano is also popular among hikers.
Mount Merbabu is a dormant stratovolcano in Central Java province on the Indonesian island of Java. The name Merbabu could be loosely translated as 'Mountain of Ash' from the Javanese combined words; Meru means "mountain" and awu or abu means "ash".
Mount Sinabung is a Pleistocene-to-Holocene stratovolcano of andesite and dacite in the Karo plateau of Karo Regency, North Sumatra, Indonesia, 40 kilometres (25 mi) from the Lake Toba supervolcano. Many old lava flows are on its flanks and the last known eruption, before recent times, occurred 1200 years before present, between 740 - 880 CE. Solfataric activities were last observed at the summit in 1912; recent documented events include an eruption in the early hours of 29 August 2010 and eruptions in September and November 2013, January, February and October 2014. The volcano has recently claimed the life of at least 23 people in a number of events since 2014. Between 2013 and 2014, the alert for a major event was increased with no significant activity. On 2 June 2015, the alert was again increased, and on 26 June 2015, at least 10,000 people were evacuated, fearing a major eruption. The long eruption of Mount Sinabung is similar to that of Mount Unzen in Japan, which erupted for five years after lying dormant for 400 years. A major eruption began on 10 August 2020.
Segara Anak is a crater lake in the caldera that formed during the explosive volcanic eruption of Mount Samalas in 1257. The caldera is next to Mount Rinjani on Lombok Island in Indonesia. "Segara Anak" means "child of the sea" and refers to the blue lake's resemblance to the sea. The volcanic cone Gunung Barujari is at the eastern end of the lake and is responsible for its crescent shape. The lake temperature is 20–22 °C (68–72 °F), which is 5-7 °C (9-13 °F) higher than normal for a lake at its altitude. Hot magma below the lake is responsible for this anomaly. Gas bubbles escape from the lake floor, helping the lake to have a pH of 7-8.
Volcanological Survey of Indonesia is the official Indonesian government agency under Ministry of Energy and Mineral Resources which are responsible for investigating, recording, and warning about volcanoes within the Indonesian region of responsibility and geological hazard mitigation.
In late October 2010, Mount Merapi in border of Central Java and Special Region of Yogyakarta, Indonesia began an increasingly violent series of eruptions that continued into November. Seismic activity around the volcano increased from mid-September onwards, culminating in repeated outbursts of lava and volcanic ash. Large eruption columns formed, causing numerous pyroclastic flows down the heavily populated slopes of the volcano. The 2010 eruption of Merapi was the volcano's largest since 1872.
On 3 December 2023, Mount Marapi, a complex volcano on the Indonesian island of Sumatra, erupted, sending ash as high as 3,000 metres (10,000 ft) into the air, and depositing large amounts of volcanic ash in nearby districts. Twenty-four hikers were found dead near the crater of the volcano.
During the night of 20 February 1979, the Sinila volcano of the Dieng Volcanic Complex erupted on the Indonesian island of Java in Central Java province. Over 175 people died, mainly due to gas poisoning in villages on the plateau near the Sinila crater. It was the fourth Sinila eruption since 1928, and the first one since 1951.
References
- 1 2 3 4 5 "Vulkaan barst uit: tientallen doden op Sumatra". Het Vrije Volk (in Dutch). 1 May 1979 – via Delpher.
- 1 2 3 "Merapi eist 80 levens bij uitbarsting". Algemeen Dagblad (in Dutch). 2 May 1979 – via Delpher.
- 1 2 "Pre-historische Toba-ramp maakte verrukkelijk meer". De Telegraaf (in Dutch). 5 May 1979 – via Delpher.
- 1 2 Nurjana, Rahma (4 December 2023). "Scores stranded as villages blanketed by ash after Indonesia's Marapi volcano erupts". MSN . USA Today. Archived from the original on 4 December 2023. Retrieved 4 December 2023.
- ↑ Pusat Meteorologi dan Geofisika (1979), Laporan bencana alam Gunung Marapi, Sumatera Barat, tanggal 30 April 1979 (in Indonesian), Jakarta: [s.n.], retrieved 4 December 2023
- ↑ "Pre-historische Toba-ramp maakte verrukkelijk meer". De Telegraaf (in Dutch). 5 May 1979 – via Delpher.
- 1 2 "70 doden door vulkaan op Sumatra". NRC Handelsblad (in Dutch). 1 May 1979 – via Delpher.
- ↑ "Aardschuiving eist 77 levens op Sumatra". De Volkskrant (in Dutch). 2 May 1979 – via Delpher.
- ↑ "Vulkaan-eruptie op Sumatra: zeker 77 doden". Nieuwsblad van het Noorden (in Dutch). 1 May 1979 – via Delpher.
- ↑ "Tientallen doden bij vulkaanuitbarsting op Sumatra". Vrije Stem (in Dutch). 3 May 1979 – via Delpher.
