Category Archives: geohazards

Earthquake ‘precursors’ and the curse of the false positive

Whenever you read a story that describes some phenomenon that preceded a large earthquake, and dangles the carrot of true earthquake prediction, don’t just look at the headline event. Check for false positives. Continue reading

Categories: earthquakes, geohazards, geophysics

Levees and the illusion of flood control

Levees have their uses in protecting communities from flooding – but they also create the illusion of safety that promotes further settlement and development of floodplain lands. Continue reading

Categories: by Anne, geohazards, hydrology, society

Natural disasters may not always hit hardest where you’d expect

For many natural hazards, the actual risk is not purely a function of frequency and magnitude: politics, regulation and psychology are also a large influence on the potential human impact. Continue reading

Categories: earthquakes, geohazards, society

Flooding along the Mississippi River

In case other events have crowded it out of your news feed, there’s record-breaking flooding going on in the Mississippi River basin. Snowmelt in the headwaters, combined with weeks of heavy rains in the middle reaches of the river basin, … Continue reading

Categories: by Anne, geohazards, hydrology, Uncategorized

The many faces of earthquake triggering

Can large earthquakes beget more large earthquakes? It’s an easy question to ask, but much more difficult to answer. Depending on the distance from, and time since, the initial earthquake, the processes that may result in ‘seismic triggering’ are very … Continue reading

Categories: earthquakes, geohazards, tectonics