q for dhuy and john, page-5

john435 has stated correctly.

There was little to no impact on Sumatra apart from the earthquake and subsequent aftershocks mainly in Banda Aceh.

No major damage has been reported and no casualties, also no Tsunami occurred only a wave of about 0.8 of a metre reported.

Also a bit of perspective. Ranua is inland and at the opposite end of Sumatra. Even if there were to be a tsunami in the future it would have absolutely no physical impact on Ranau or any other company in the Sth Sumatra Basin.