TDMRC-EOS team observing a tsunami wiped area in the Palu Bay

Central Sulawesi Reconnaissance Survey: Study of the Tsunami Sediment

TDMRC-EOS researchers observing tsunami sites to find sample locations
TDMRC-EOS researchers observing tsunami sites to find sample locations

The team investigating the Palu tsunami sediment was comprised of representatives from the Earth Observatory of Singapore (EOS), namely Prof. Adam Switzer, Dr. Peter Parham, dan Dr. Jedrzej Majewski, and from TDMRC, namely Dr. Benazir.

The investigation began with short visits to several tsunami sites to find the suitable locations for retrieval of tsunami sediments. The three day long search for sample locations swept along the Palu Bay, all the way from Lero Beach on the east side to Tanjung Karang Beach on the west side.

After a long investigation, the team decided to retrieve tsunami sediment samples from Loli Pisuah and Pantoloan village, as well as the section of the Palu City adjacent to Hotel Mercure and SMPN (State Junior High School) 10 Palu. At each location, the team also made transects from the shorelines to the farthest sample retrieval point.

TDMRC-EOS researcher retrieving tsunami sediment samples
TDMRC-EOS researcher retrieving tsunami sediment samples

The samples exhibited different physical characteristics. Those retrieved from Palu were fine to medium-grained sand with thickness ranging from 3 to 5 cm. Where as the samples from the east and west sides of the bay had a more coarse gradation, falling into the category of medium to coarse-grained sand with the average thickness of 5 cm.

All of the samples are being treated and analyzed at EOS at the moment. Detailed report of the result will be made public as soon as the analysis is complete.