ANCHORAGE - Mount Redoubt has been quietly busy since the last explosion in April.
The volcano has continued to ooze lava from its vent, creating a massive hardened dome that could blow at any moment and unleash another ash fall on Southcentral Alaska.
The volcano's dome is now roughly the size of nine football fields. Scientists say it has formed a plug over its steaming vent. That has kept ash from spewing into the atmosphere and has perhaps led many to believe the volcano's rumblings are over.
But if the dome cracks or collapses - as it likely will - ash could once again blast tens of thousands of feet into the atmosphere and ground airplanes during Alaska's busy summer tourist season.