Tungurahua volcano of Equador has produced a strong explosion and pyroclastic flows,

http://earth-of-fire.over-blog.com/pages/tungurahua-strong-explosion-and-pyrolastic-flows--8724538.html.

Mt Rokatenda Volcano in Indonesia erupts,

http://www.abc.net.au/news/2013-08-10/indonesia27s-mount-rokatenda-erupts-on-august-102c-2013/4878454.

Aren't we overdue a really spectacular eruption? A Tambora would be nice

It would certainly take global warming out of the spotlight for a few years 

In all seriousness though, I think Katla in Iceland may be worth keeping an eye on in the next few years. Mt Pinatubo in 1991 was the last big one, that halted global warming from 1992 - 1994, a VEI 5 volcano or higher usually has enough of an impact global temperatures, be careful what you wish for though......

Or Toba - for the 15000 who survived this supervolcanic event. Be careful what you wish for!

http://en.wikipedia.org/wiki/Toba_catastrophe_theory

(but, sadly, the historical revisionists have been at work - a 'beautiful theory slain by an ugly fact'.)

Yes, well Toba would be a tad extreme I grant you. Although we'd likely get a sub-zero CET from it

A nice eruption from Sakurajima volcano of Japan,

http://www.bbc.co.uk/news/world-asia-23751191.

A geyser-like vent has opened up outside Rome Airport. Gases and steam has been seen shooting up 10 maybe 15ft into the air. It is not known yet if it's related to volcanism.

http://www.telegraph.co.uk/news/worldnews/europe/italy/10265372/Volcanic-geyser-erupts-close-to-Rome-airport.html.

The nearest dormant volcano to Rome is Alban Hills, http://en.wikipedia.org/wiki/Alban_Hills.

Potentially interesting.  However, the report seems to play it down as a likely one off event 

 LLTNP 105m asl 

If you fly into Rome from the north you can see a series of old volcanoes stretching down through Rome to finish at the currently active Vesuvius. So that looks like the Italian plate which is moving north to crunch up the Alps has over millennia passed over a hot spot (cf islands near Hawaii) and the next  major volcano should break out south of Vesuvius. So, without investigation on the ground, I'd suspect just a bit of left-over heat rather than a sign of a major eruption.

Shiveluch volcano may have been responsible for the cold wave in Midwest of USA.

http://volcans.blogs-de-voyage.fr/2013/09/04/le-shiveluch-et-la-vague-de-froid-du-midwest-des-etats-unis-shiveluch-and-the-cold-wave-in-the-midwest/

This took some time before being reported -

http://www.bbc.co.uk/news/science-environment-24332239

It seems that although the Pacific 'Ring of Fire' [NZ - Japan - Alaska - Mexico - Chile]is well known for significant and persistent eruptions, to get something really big if less frequent you need to step a little to one side and look at Indonesia [Krakatoa, Tambora, Lombok as in the article; also Toba a long way back]. A different quality of magma? Deeper interaction betwen plates?

That's very interesting.

It seems that area has been responsible for some of the most violent eruptions in recent history.

Predicting the next one will be difficult enough but mitigation is impossible.

Supervolcanoes once existed on Mars,

http://www.youtube.com/watch?v=03cvOFqGyTY.

The recently active areas of Surtsey, Westmann Islands and Eyjafjallajokull are all around 50-60 miles SE of Rejkjavik. Plenty of geothermal activity closer, enough to run outdoor swimming pools throughout the year in Rejkjavik itself.

There are several dormant volcanoes close to the earthquake epicentre; in particular Reykjanes (LE 1226), Krisuvik (LE 1340?), Brennisteinsfjöll (LE 1341) plus submarine volcano, Reykjaneshryggur (LE 1970?), which of course, forms part of the very long Mid-Atlantic Ridge.

Further details on this earthquake swarm here, http://www.volcanodiscovery.com/reykjanes/news.html.