On July 24, 2009 the IRIS Sesimc Monitor (Europe) shows that a 4.1 earthquake shook Northern Germany. The Earthquake is reported in more detail by USGS Europe Region:
Magnitude 4.1 Friday, July 24, 2009 at 02:58:06 UTC
Friday, July 24, 2009 at 04:58:06 AM at epicenter - Region Germany
epicenter - 20 km (15 miles) NW of Duisburg, Germany
I cannot see this reported anywhere other than in small regional sites, reporting a 3.1 earthquake, another quotes 3.8 frequency. The Swiss Red Puma earthquake site have listed the 24 July earthquake in Turkey but not the earthquake in North Germany.