The announcement came after a four-month process run by the Department of Conservation.
"The earthquakes represent something new at Ruapehu, and we are working on understanding the details of the processes driving them."
The couple were not injured.
The Department of Conservation has spent $1.1 million on the building's maintenance since it closed in February.
Newshub can reveal Cabinet has met to rubber-stamp a new $7.35 million support package to allow RAL to continue until March 2024.
Since mid-July, the temperature of the crater lake has risen from 11C to 26C.
Snow enthusiasts were only able to enjoy sledding on Mt Ruapehu on Saturday.
It's been revealed a local iwi lined up to bid for the ski fields months ago - but the minister was never told about it.
It comes after a watershed meeting on Tuesday.