I just came across an article that discusses the impact of the 2015-2016 El Nino on landslides in California. You can read it at this link: http://landslides.usgs.gov/monitoring/2015elnino/ncal.php.
How would you think that the El Nino impacted the incidence of landslides in that region? Historically it is the large winter storms that cause the devastating landslides in the Francisco area. What do you think causes landslides to occur anyway?
If you look at this website, you will learn about the different types of landslides and see records about how the El Nino conditions from previous years impacted the incidence of landslides in the Central and Northern California region.
This would be an interesting type of research to consider- how do you think your region was impacted by this past winter's El Nino conditions?