"Back in 1783 another volcano in Iceland caused thick fog across Europe and even spread as far as the US, for eight months"
Followed by:
"Iceland’s Katla Volcano New Seismic Activity 4/28/10: Eruption Imminent Today, Iceland’s Katla volcano had a significant earthquake. Although no eruption has happened yet, this would be the normal course of events prior to an eruption. No official news story available at this time, but the seismograph data is available for public viewing here:
Icelandic Meteorological Office - Volcanic Eruption - Seismicity - Weather forecasts - Weather observations - Avalanches - Hydrology - Climatology - Sea Ice
It is not known when Katla will erupt but it is commonly accepted, especially by the Icelandic population, that this is only the beginning of the saga that will be the eruption of this massive glacial volcano. Earthquakes in Katla’s vicinity are the only real warning we have about when the eruption is getting close, and as we see seismic activity in the region increase, it will only mean one thing, that an eruption is imminent.
If you have been watching the eruptions at Eyjafjallajokull, you may be aware that this volcano is, historically, a precursor to large scale Katla eruptions. The president of Iceland spoke with the BBC about a week ago, expressing his concerns about Katla. He believes that it is not if Katla blows, but when. The history with this volcano and Eyjafjallajokull indicate that Katla could erupt anytime between now and a year or two from now.