This figure shows the location of historical blooms (adapted from Magaña et al. 2003). The dates indicate where the bloom was first observed. The spatial extent of the blooms varies from event to event. A description of the blooms through the 2000 event can be found in Magaña et al. (2004). Click here for a PDF file of the paper in Harmful Algae (yes, that is the name of the journal).