Calbuco in Chile has spent the last few days fairly quiet, pumping out a small steam-and-ash plume. However, today the volcano produced the third significant explosive eruption since Calbuco came back to life last week. This explosion appears to be less vigorous than the first two eruptions, but the ~5-kilometer-tall (~16,000 foot) dark grey ash plume (see above) is likely to dump more ash and volcanic debris over an area already attempting to recover from the previous eruptions. The status update this morning from the SERNAGEOMIN may have foreshadowed today's explosion as they mention that volcanic tremor (usually associated with magma moving under the volcano) was much elevated compared to the last few days. The tremor really picked up around 1:09 pm local time, only about 10-15 minutes before the eruption began, according to the SERNAGEOMIN report on today's explosion. Today's eruption also produced new lahars on the slopes of Calbuco.