I am sorry for this late update. But yesterday I was busy and today I had a dentist appointment and I had to recover from it today.
Yesterday (30.04.2013) El Hierro volcano had a magnitude 3.4 earthquake, with the depth of around 12 km. This earthquake was not felt in the El Hierro island from the looks of it. More details about this earthquake can be found here, on EMSC web site.
For the moment. It appears that El Hierro volcano is quiet at the moment. But I currently do not know for sure. Since my automatic earthquake counter is down due computer part failure (details can be found here). I hope to have that fixed soon.