Editing Mount Tambora (section)

== Monitoring ==

Indonesia's population has been increasing rapidly since the 1815 eruption. In 2020, the population of the country reached 270 million people, of which 56% concentrated on the island of [[Java]].<ref>{{cite web |publisher=Indonesian Central Statistics Bureau |title=Penduduk Migran Seumur Hidup |url=http://sp2010.bps.go.id/ |language=id |url-status=live |archive-url=https://web.archive.org/web/20101105023434/http://sp2010.bps.go.id/ |archive-date=5 November 2010 |df=dmy-all |access-date=2 August 2018}}</ref> An event as significant as the 1815 eruption would impact about eight million people.<ref>{{cite journal |last1=Simpson |first1=Alanna |last2=Johnson |first2=R. Wally |last3=Cummins |first3=Phil |title=Volcanic threat in developing countries of the Asia–Pacific region: probabilistic hazard assessment, population risks, and information gaps |journal=Natural Hazards |date=1 May 2011 |volume=57 |issue=2 |page=162 |doi=10.1007/s11069-010-9601-y |bibcode=2011NatHa..57..151S |s2cid=129040686}}</ref>

[[Seismology|Seismic activity]] in Indonesia is monitored by the Directorate of Volcanology and Geological Hazard Mitigation with the monitoring post for Mount Tambora located at Doro Peti village.<ref name="vsidanger">{{cite web |url=http://merapi.vsi.esdm.go.id/?static/volcano/tambora/bahaya.html |title=Tambora Hazard Mitigation |publisher=Directorate of Volcanology and Geological Hazard Mitigation |language=id |url-status=dead |archive-url=https://web.archive.org/web/20070929120048/http://merapi.vsi.esdm.go.id/?static%2Fvolcano%2Ftambora%2Fbahaya.html |archive-date=29 September 2007 |access-date=2 August 2018}}</ref> They focus on seismic and [[tectonic]] activity by using a [[seismograph]]. There has been no significant increase in seismic activity since the 1880 eruption. Monitoring is continuously performed inside the caldera, with a focus on the parasitic cone ''Doro Api Toi''.<ref>{{cite web |publisher=Directorate of Volcanology and Geological Hazard Mitigation, Indonesia |title=Tambora Geophysics |language=id |url=http://merapi.vsi.esdm.go.id/?static/volcano/tambora/geofisika.html |url-status=dead |archive-url=https://web.archive.org/web/20070929120113/http://merapi.vsi.esdm.go.id/?static%2Fvolcano%2Ftambora%2Fgeofisika.html |archive-date=29 September 2007 |access-date=2 August 2018}}</ref>

The directorate created a [[disaster mitigation]] map for Mount Tambora, which designates two zones for an eruption: a dangerous zone and a cautious zone.<ref name="vsidanger"/> The dangerous zone identifies areas that would be directly affected by pyroclastic flows, lava flows or pyroclastic falls. It includes areas such as the caldera and its surroundings, a span of up to {{convert|58.7|km2|acre}} where habitation is prohibited. The cautious zone consists of land that might be indirectly affected, either by [[lahar]] flows and other pumice stones. The size of the cautious area is {{convert|185|km2|acre}}, and includes Pasanggrahan, Doro Peti, Rao, Labuan Kenanga, Gubu Ponda, Kawindana Toi and Hoddo villages. A river, called Guwu, at the southern and northwest part of the mountain is also included in the cautious zone.<ref name="vsidanger"/>