Category Archives: geohazards

Friday focal mechanism: mountain building in Argentina

Yesterday a magnitude 6.2 earthquake struck in the Jujuy province of northwestern Argentina, in the western foothills of the Andes. What few news reports there are indicate strong shaking but little damage in what seems to be a remote and … Continue reading

Categories: earthquakes, focal mechanisms, geohazards, structures

One recipe for flooding: Take a tropical cyclone and add steep topography

The past few weeks have brought two tropical cyclones* to the eastern seaboard of the United States. They serve nicely to illustrate the topographic controls on flood generation that we were been talking about in my Fluvial Processes class recently. … Continue reading

Categories: by Anne, geohazards, geomorphology, hydrology

Flooding around the world (3 July edition)

Here is a brief update on the floods I covered in the last edition of flooding around the world. Note that there has also been flooding in Xiengkoung, Viengtian, Boolikhamxay, and Xayaboury provinces of Laos, as a result of heavy … Continue reading

Categories: by Anne, geohazards, hydrology

Update: Christchurch aftershocks

As the aftershocks of the Darfield quake continue, where do the future seismic dangers lie? Continue reading

Categories: earthquakes, geohazards, tectonics

Flooding around the world (26 June edition)

Since the last edition of flooding around the world, flooding along the Mississippi River has mostly subsided, but flooding continues along the Missouri River and in China. Several new flood wetspots have also popped up, as the image below from … Continue reading

Categories: by Anne, geohazards, hydrology