La Palma volcano update: Strongest-so-far quake at magnitude 4.3 hits 35 km under eastern flank
Thu, 7 Oct 2021, 12:4512:45 PM | BY: T
The largest-so-far earthquake occurred an hour ago under the eastern flank at 35 km depth. Its magnitude was measured at 4.3 according to IGN and it was felt on most of the island.
Location of today's magnitude 4.3 quake under Cumbre Vieja's east flank
What the increase in quakes and their location in the upper mantle mean in relationship with the eruption is difficult to say, but likely will become more evident in the future, along with more data such as overall seismicity and ground deformation in particular.
One scenario is that they reflect deep magma intrusions, which could further rise and aliment the shallower magma plumbing system currently feeding the eruption.