YSI in Sulawesi
On 28 September 2018, a shallow, large earthquake struck in the neck of the Minahasa Peninsula, Indonesia, with its epicentre located in the mountainous Donggala Regency, Central Sulawesi. The magnitude 7.5 quake was located 77 km (48 mi) away from the provincial capital Palu; it was preceded by a sequence of foreshocks, the largest of which was a magnitude 6.1 tremor that occurred earlier that day. A localised tsunami, its height reaching an estimated 4 to 7 metres (13 to 23 ft), struck the settlements of Palu, Donggala and Mamuju. The combined effects of the earthquake and tsunami led to the deaths of over 2,000 people and more than double that figure seriously injured. The earthquake also caused major soil liquefaction in areas in and around Palu. In two locations this led to mudflows in which many buildings became submerged causing hundreds of deaths with many more missing. The liquefaction was considered to be the largest in the world and was deemed as a rare occurence. (Source: Wikipedia). See the video below showing the tsunami and liquefaction.