Methods and compositions for volcanic ash lost circulation materials

A method comprising:

• introducing a lost circulation material to a zone of interest in a subterranean formation via a wellbore, the zone of interest comprising depleted zones, zones of low pressure, lost circulation zones, fractured zones, or any combination thereof;
• wherein the lost circulation material comprises:
• volcanic ash,
• an activator, wherein the activator comprises about 25 wt % to about 75 wt % sodium silicate, about 15 wt % to about 50 wt % sodium hydroxide, or any combination thereof, the weight percentages based on a total weight of the activator, and
• a resinous composition, and solidifying, at least partially, the lost circulation material such that the solidified lost circulation material at least partially blocks the wellbore from the zone of interest.