Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
Breaking News
2022 URISA Board Election Results Announced
URISA is pleased to announce the results of its...
ASTERRA’s new satellite based PolSAR technology uses AI for eco-friendly exploration of lithium
Patent filed for new lithium mineral location technology TEL...
EagleView Announces New Bid Perfect™ Report for Construction and Roofing Sales Workflows
Contractors can access data with guaranteed accuracy at the...
Trimble Showcases Customer-Driven Platform Strategy to Open its Insight Tech Conference + Expo
Annual Transportation Event Dedicated to Enhancing Supply Chain Collaboration...
NV5 Awarded $13 Million in Geospatial Contracts to Support California Wildfire Mitigation
HOLLYWOOD, Fla. - NV5 Global, Inc. (the “Company” or...
On Aug. 22, 2013, the Landsat 8 satellite captured this view of the lake in East Java, Indonesia. The turquoise color comes from the range of materials dissolved in the water, including hydrochloric and sulfuric acids. The craters of several other volcanoes are also visible within the 20-kilometer-wide (12-mile) Ijen caldera.

On Aug. 22, 2013, the Landsat 8 satellite captured this view of the lake in East Java, Indonesia. The turquoise color comes from the range of materials dissolved in the water, including hydrochloric and sulfuric acids. The craters of several other volcanoes are also visible within the 20-kilometer-wide (12-mile) Ijen caldera.

The turquoise lake in the crater of the Kawah Ijen volcano looks serene and inviting. It also happens to be the world’s largest acidic lake. The water in the crater lake has a pH less than 0.3 on a scale of 0 to 14 (7 is neutral). For comparison, lemon juice has a pH of 2; battery acid has a pH of 1. That acidity affects the chemistry of nearby river ecosystems, including the river Banyupahit.

Originating at the lake, the Banyupahit delivers acidic water to populated areas downstream. According to a 2005 research paper, the river water that local farmers use to irrigate crops has a pH between 2.5 and 3.5. The normal range for stream water, according to the U.S. Geological Survey, is between about 6 and 8.

The plume drifting west from the crater likely comes from fumaroles, which release hot gases from underground magma. The plume could also come from hot springs and mud pots, according to Erik Klemetti, a volcanologist at Denison University. “The plume is white, so it is likely mostly steam with some other volcanic gases like carbon dioxide and sulfur dioxide mixed in.”

Image courtesy of NASA.

Read the full story.

Comments are closed.