A strong and shallow earthquake registered by the USGS as M6.4 hit just SSW of Bogorawatu, Indonesia at 05:10 UTC (13:10 local time) on Jan 22. The agency is reporting a depth of 27 km (16.7 miles).
The quake was preceded by 4 lesser quakes ranging from M4.5 to M6.0.
The epicentre was located 85 km (53 miles) SSW of Bogorawatu.
There are an estimated 95,000 people living within 100 km (62 miles).
No tsunami warning has been issued, and there were no immediate reports of damage.
Seismic and Volcanic activity has been correlated to changes in our sun.
The recent global uptick in earthquakes and volcanic eruptions is likely attributed to the drop-off in solar activity, coronal holes, and the increase in Galactic Cosmic Rays penetrating silica-rich magma.
Check out these link for more info:
Grand Solar Minimum