Indonesia Geol9

        The most dangerous hazards of Indonesia are earthquakes and land subsidence. These two hazards are capable of causing and intensifying other hazards.  Earthquakes can cause tsunamis, volcanic eruptions, landslides, and sinkholes. Land subsidence can cause sinkholes and landslides and can intensify flooding and coastal erosion. These two hazards have large economic effects and are root hazards in the country of Indonesia.  Earthquakes          Indonesia sits on the intersection of 3 plate boundaries: the Eurasian, Philippine, and Australian plates. These boundaries have created various types of faults which are very active, on average the country and its neighbors experience 320 earthquakes ≥ 5.0 magnitude and 3 earthquakes ≤ 7.0 magnitude per year.  About 50% of the world's seismic activity has come from or around the island of Sumatra since 2000.  In the last 30 days alone (4/21/25-5/21/25) 191 earthquak...

  Indonesia suffers from coastal erosion, several of the nations islands are affected by this hazard. The island of Bali the major tourist destination is dwindling at a steady pace. The shoreline has receded from 668.64 kilometers to 662.59 kilometers between 2016 and 2021 setting a average rate of 3.97 feet lost per year. On the central island of Sulawesi, the erosion of the shoreline has claimed 44 acres of land and racked hundreds of millions of rupiah in damages over a 2 year period. The abrasion is so severe there that sea water made it's way into groundwater supplies contaminating the drinking water.  This has forced residents to find alternative solutions to obtain water, some use rain collectors, others purchase gallons which can be stenosis on the impoverished residents.    A percentage of these issues are caused by the removal of natural barriers such as mangrove trees and human interference. In Java 78% percent of the mangroves around the coast are gone, l...