Egon, Lewotobi, Ilimuda, and Lereboleng, Flores Islands, Indonesia


Egon, Flores Islands, Indonesia

Location: 8.7S, 122.5E
Elevation: 5,585 feet (1,703 m)
Last update: February 10, 2004

Egon is a stratovolcano with a single confirmed eruption in 1907. An eruption from 1888-1889 is reported but not confirmed.


February 10, 2004

The volcanic activity that began on January 29 had significantly decreased by the 5th of February. More than 1,000 were allowed to return home that day.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


February 3, 2004

An eruption began on January 29 around 0400. First, a landslide traveled down the eastern side of the crater wall and at 1700, an explosion produced a black ash cloud to a height of ~750 m above the summit. In the following two days, loud noises were accompanied by gray ash clouds and a strong scent of sulfur every 50-60 minutes. A sulfur-rich fumarole was created on the S side of the volcano. Seismic activity was high and the volcano was put at Alert Level 3 (on a scale of 1-4) on February 2. The evacuation of residents near the volcano began on January 29 and by February 1 nearly 6000 people had moved into safer zones. At least one death was reported, although it was not clear if it resulted from the volcanic activity, evacuation process, or other causes. According to news reports, many of the evacuees suffered from respiratory problems, dengue fever, malaria, and diarrhea. There were also reports of looting in the evacuated villages.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


Lewotobi, Flores Islands, Indonesia

Location: 8.53S, 122.775E
Elevation: 1,703 m (5,587.2 feet)

Last update: January 26, 2004

Lewotobi is a stratovolcano with at least 19 historic eruptions between 1675 and 1991. Most eruptions are from the Lewotobi Lakilaki vent. Only two eruptions have been from the Lewotobi Perempuan vent. Most eruptions are explosive and moderate to moderate large (VEI=2-3) in size. Eruptions in 1869 and 1907 caused a total of three fatalities. Space shuttle photo STS060-0106-0008.


November 4, 2003

The Alert Level was reduced from 2 to 1 as a result of decreased volcanic activity from Oct. 13-19. Only low levels of gas were emitted from Lewotobi.
This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


September 2 2003

On Sept. 1, an eruption produced an ash plume that rose ~2.5 km high. The Alert
Level was raised to a 4 and evacuations took place in areas surrounding the volcano. By the 2nd, the Alert Level was lowered to 3.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


June 17, 2003

On May 30, an explosion sent an ash column to a height of ~200 m above the summit. Ash fell on the observatory about 5 km from the crater. As of 1 June, Lewotobi was at Alert Level 2 (on a scale of 1-4).

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


October 15, 2002

At 23:30 on the evening of October 12, an explosion occurred and a weak thundering sound was heard. The explosion produced an ash column ~500 m high and ash deposits reached up to 5 km from the volcano. More explosions are expected to take place over the next couple of weeks and months. It has been placed under an alert level 4 warning.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


July 1, 1999

On 1 July 1999, the Mount Lewotobi Volcano sent up a plume of ash and volcanic debris. No injuries were reported.

This information was summarized from Discovery Online


Egon, Flores Islands, Indonesia

Location: 8.7S, 122.5E
Elevation: 5,585 feet (1,703 m)
Last update: February 10, 2004

Egon is a stratovolcano with a single confirmed eruption in 1907. An eruption from 1888-1889 is reported but not confirmed.


February 10, 2004

The volcanic activity that began on January 29 had significantly decreased by the 5th of February. More than 1,000 were allowed to return home that day.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


February 3, 2004

An eruption began on January 29 around 0400. First, a landslide traveled down the eastern side of the crater wall and at 1700, an explosion produced a black ash cloud to a height of ~750 m above the summit. In the following two days, loud noises were accompanied by gray ash clouds and a strong scent of sulfur every 50-60 minutes. A sulfur-rich fumarole was created on the S side of the volcano. Seismic activity was high and the volcano was put at Alert Level 3 (on a scale of 1-4) on February 2. The evacuation of residents near the volcano began on January 29 and by February 1 nearly 6000 people had moved into safer zones. At least one death was reported, although it was not clear if it resulted from the volcanic activity, evacuation process, or other causes. According to news reports, many of the evacuees suffered from respiratory problems, dengue fever, malaria, and diarrhea. There were also reports of looting in the evacuated villages.

This information was summarized from the GVP/USGS Weekly Volcanic Activity Report


Ilimuda, Flores Islands, Indonesia

Location: 8.5S, 121.7E
Elevation: 3,608 feet (1,100 m)

Ilimuda is a stratovolcano with no historic eruptions. Fumaroles are present on the volcano.


Lereboleng, Flores Islands, Indonesia

Location: 8.4S, 122.8E
Elevation: 3,663 feet (1,117 m)

Lereboleng, a complex volcano, erupted from the Burak vent in 1873, 1876, and 1881.


Sources of Information: Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.

Neumann van Padang, M., 1951, Indonesia. Catalogue of the Active Volcanoes of the World, International Association of Volcanology, 1, Rome, Italy, 271 p.



Images of Volcanoes To VolcanoWorld