Last weekend, rainfall triggered a massive landslide near Oso, Washington that killed at least 24 people. There have been many news reports about the event, but I believe NASA is the first to provide satellite imagery of the area post-landslide.
The imagery isn’t particularly sharp, but it shows the massive scale of the landslide. In addition, the landslide has blocked the Stillaguamish River, creating a barrier lake and flooding additional homes. While the timing is always unknown for events like this, the possibility has existed for years:
According to Durham University geologist Dave Petley, the landslide was a reactivation of an earlier landslide that caused problems in 1988 and 2006. The Seattle Times has reported that retired US. Geological Survey geologist Daniel Miller warned the hillside had the “potential for a large catastrophic failure” in a report filed with U.S. Corp of Engineers in 1999.