Rather tectonic

Magnitude M 4.6
Region NORTHERN SUMATRA, INDONESIA
Date time 2013-02-17 15:14:59.6 UTC
Location 5.08 N ; 95.50 E
Depth 10 km
map [link to static1.emsc.eu]

but two volcanos at distance lesser 50 km

[link to www.volcano.si.edu]
Seulawah Agam
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1839
Seulawah Agam at the NW tip of Sumatra is an extensively forested volcano of Pleistocene-Holocene age constructed within the large Pleistocene Lam Teuba caldera. A smaller 8 x 6 km caldera lies within Lam Teuba caldera. The summit contains a forested, 400-m-wide crater. The active van Heutsz crater, located at 650 m on the NNE flank of Suelawah Agam, is one of several areas containing active fumarole fields...

[link to www.volcano.si.edu]
Peuet Sague
Volcano Type: Complex volcano
Volcano Status: Historical
Last Known Eruption: 2000
Peuet Sague is a large volcanic complex that rises to 2801 m in NW Sumatra. The volcano, whose name means "square," contains four summit peaks, with the youngest lava dome being located to the north or NW. This extremely isolated volcano lies several days journey on foot from the nearest village and is infrequently visited...