Fears of another landslide and possible tsunami are mounting for the Anak Krakatoa volcano in the Sunda Strait, Indonesia. Scientists with Indonesia’s Meteorology, Climatology and Geophysics Agency (BMKG) have discovered new cracks that could be an early indication of another landslide. These cracks are deep and wide enough to emit steam and ash. A violent explosion of the Krakatoa volcano triggered a deadly tsunami that struck Indonesia on December 22 that struck Java and Sumatra. A landslide formed by these cracks is estimated to be 67 million cubic meters compared to the estimated 90 million cubic meters from the December 22 event.
A report has been released by the NYSDOT on the Scoby Hill Landslide which has impacted a 4.2-mi improvement project of Route 219. The report, dated May 20, 2008 was headed to an FHWA peer review panel.
The Feds were call in to help because of the unusual nature of the landslide. The slip surface is very deep, approximately 30-m (100-ft) below the surface and below all of the design phase investigations. And the remolded shear strength of the silty clay forming the slip surface was only 12-14 degrees.
Read on for more details of the slide. (Photo by NYSDOT)