[breput]

You're thinking of Mauna Kea, which is some distance - both horizontally and vertically - from Mauna Loa.

[ceejayoz]

https://en.wikipedia.org/wiki/Mauna_Loa_Observatory

https://en.wikipedia.org/wiki/2022_eruption_of_Mauna_Loa

Mauna Kea is dormant for the last 5k years or so.

[breput]

You're right - I meant Kilauea