Update 2018-07-29: According to latest reports from Sunday (29 July), at least ten people were killed and about 40 more were injured in the earthquake and its aftershocks at Lombok. The quake could be felt in Bali, although there were no immediate reports of damage there. Trekking trails on Mount Rinjani were closed because of landslides. No tsunami warning was issued.
Update 2018-07-28: An earthquake measuring 6.4 M shook the Indonesian island of Lombok on Sunday morning (29 July, local time). The center of the quake was measured by the US earthquake observatory USGS near Lelongken in the north of the island at a depth of almost 7.5 kilometers. Initial reports indicate damage to buildings and infrastructure.
Extensive disruptions to the infrastructure (transport, power-, water supply etc.) are to be expected. Travellers should closely follow instructions by authorities. Due to the earthquake, strong aftershocks are to be expected. Travellers should exercise high caution and stay away from damaged buildings and hillsides.
2018-07-28, Indonesia: Strong magnitude 6.4 M coastal earthquake
Earthquakes of this magnitude cause damage (sometimes severe), to buildings and infrastructure. Transport and infrastructure disruptions are to be expected.
It is unlikely that a destructive tsunami was generated by a coastal earthquake of this magnitude. Smaller, local tsunamis can occur in coastal areas.