(CNN) New satellite images show the extent of the changes caused by the collapse of the Indonesian volcano which caused a tsunami in late December last year.

Photos taken by Planet Labs satellites show the Anak Krakatau volcano both before and after the December 22 eruption, which caused a 64-hectare (158-acre) chunk of the volcano's cone to slide into the ocean.

Additional eruptions the following week also caused the volcano to lose volume of 150 million to 180 million cubic meters (5.3 billion to 6.4 billion cubic feet), the report said.

Its volume is now 40 million to 70 million cubic meters (1.4 billion to 2.5 billion cubic feet), Indonesia's Center of Volcanology and Geological Hazard Mitigation said in a report.

The volcano, which is located around 50 kilometers west of the Indonesian province of Java, lost two-thirds of its height following the eruption and subsequent collapse, according to the Center's report.

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