Thanks. You are correct. I honestly had no idea that these volcanoes were in that area.
From the article I should have read more carefully:
“The buttes are small volcanoes with an explosive past. Miles below them is a pool of magma that is 15 miles wide. About 8,000 years ago, the buttes erupted, causing magma to flow which cooled into obsidian rock.
The damage from those eruptions was limited to the surrounding area, but if a major earthquake hit along the San Andreas Fault, geologists said there could be trouble.
“It really pumps energy into a freshly enlarged magma body,” said Abbot. “That would be a worst-case scenario.”
Unstable magma may find a path to the surface, which would result in the buttes erupting, oozing lava and spewing ash.”
Muy interesante...
Link to the article in post #17.