Recent Activity at Loihi Volcano
Events in 2001
Geologic Activity and Research at Loihi
Visit these 1996 Eruption Links Too:
- Septermber, 2001 - MULTIPLE EARTHQUAKES DETECTED AT LOIHI SINCE 10 SEPT 2001
Increased seismicity in the form of a swarm of earthquakes began
at Loihi's summit with quakes up to magnitude 4.7 on 10 sept 2001.
The significant of increase in seismic activity indicates renewed strong tectonic
and/or magmatic activity near the summit reagion of the seamount. Activity
began with magnitude 4.5 to 4.7 events on 10 Sept. and continues for a couple of weeks
with quakes up to magnitude 5.2.
The image below shows some of these events superimiposed on a bathimetric map.
Note that the locations of these events are still highly preliminary.
For instance, the apparent south rift zone trend on the map is suspect due
to these events having been recorded on by shore stations to the north
and west of the seamount. Shore station locations result in an location
error ellipse that follows the Loihi rift zone trend. The much larger
1996 swarm also looked elongated
along the south rift until events were later relocated using a refined velocity
model based on events detected using an ocean bottom seismometer located on
the seamount's summit.
This page created and maintained by
Last page update on 29 Sept. 2001