While the former is located on the 4 February fissure, the latter is not a true eruption vent, but it is rather the point where lava issues from a lava tube about 1 km long. Both, however, are of very similar appearance and are spots where lava wells to the surface. Tourists crowding at the effusive vent just below the hornitos formed early during the current effusive activity. The active effusive vent is at left . A close look at the active effusive vent after one group of tourists has left.
Flow is from left to right.
View northwestwards from the 1991 scoria rampart across the southwestern part of the lava flow-field emplaced since 4 February. The lava outlined in red has been added to the margin of the flow field since late-May. The summit cone complex, dominated by the SE Cone from this perspective, is visible in the background. Near continuous rock falls from a flow front advancing on a very steep part of the slope creates the light brown dust clouds visible in the center of the image. The two sites of lava effusion on 4 June are highlighted by numbers 1 and 2 .