1. ARENAL  By: Corben Davis, and Sam Gomez  GE151j

2. Costa Rican Volcano  Alujela Provence, Costa Rica

3. Tectonic formation/location

4. Formation History  Formed 7000 Years Ago  Erupted along with Chato Volcano until about 3500 years ago  Formed 7000 Years Ago  Erupted along with Chato Volcano until about 3500 years ago

5. Class: Stratovolcano Characteristics  Steep Slope  Conical  Layered ‘Stratified’ appearance Dimensions Summit: 1670m (5480ft) Consists of 3 craters

6. Eruption History  7:30 AM  July 29, 1968  VEI: 3 Killed: 87 Buried 3 villages

7. Eruption Style  Pyroclastic flows  Lava flows  Volcanic mudflows (lahars)

8. Recent Activity  Eruption from 1968-2010  Recent activity of gas emissions  Eruption from 1968-2010  Recent activity of gas emissions

9. The Eruption Hazards Local Population: 5KM: 3,429 30KM: 96,512 100KM: 3,027,485 Explosive Hazards: Potential flows diverted away from locals

10. Rock Deposits, Lava Type Major:  Andesite/Basaltic Andesite  Basalt/Picro-Basalt

11. Local Tourism  Geothermal hot springs  Hiking, climbing, mountain biking  Volcanic activity observation  Geothermal hot springs  Hiking, climbing, mountain biking  Volcanic activity observation

12. PREDICTING ERUPTIONS: VOLCANO MONITORING Four seismic stations located around Volcano 2 more located within 8km of volcano

13. Bibliography  http://www.arenal.net/arenal-volcano- overview.htm http://www.arenal.net/arenal-volcano- overview.htm  http://www.volcano.si.edu/volcano.cfm? vn=345033 http://www.volcano.si.edu/volcano.cfm? vn=345033  http://geology.com/volcanoes/arenal/ http://geology.com/volcanoes/arenal/  http://www.geology.sdsu.edu/how_volca noes_work/stratovolc_page.html http://www.geology.sdsu.edu/how_volca noes_work/stratovolc_page.html  http://puravida.com/costa-rica-central- valley/arenal-volcano/ http://puravida.com/costa-rica-central- valley/arenal-volcano/  http://www.arenal.net/arenal-volcano- overview.htm http://www.arenal.net/arenal-volcano- overview.htm  http://www.volcano.si.edu/volcano.cfm? vn=345033 http://www.volcano.si.edu/volcano.cfm? vn=345033  http://geology.com/volcanoes/arenal/ http://geology.com/volcanoes/arenal/  http://www.geology.sdsu.edu/how_volca noes_work/stratovolc_page.html http://www.geology.sdsu.edu/how_volca noes_work/stratovolc_page.html  http://puravida.com/costa-rica-central- valley/arenal-volcano/ http://puravida.com/costa-rica-central- valley/arenal-volcano/