Los Iros Slope Failure 21 August 2018

 

(click on image to view video)


Based on the drone footage taken on the 24th August 2018 there has been no new mud volcanic activity in the area

Interpreted photo 24th August 2018 showing the faults and their sense of motion. Nearly all of then are down to the west, however no deformation zone or East dipping fault exists in front of these faults.

12th October 2018 – western side of the deformation , Los Iros. No active vents are visible

An interpretation of the area of maximum faulting and disruption of the area. 24th August 2018

Montage illustrating that the event in Los Iros is a slump. There are NO mud vents in this area.

Cartoon illustrating a possible relationship of the direction of the observed failure planes and the main slump
View looking east ALL of the displacements on the faults are down to the west

E650292 N1112399 (nap) close up of westerly displacement (2′), some oblique dip slip to the right(south) may have happened. Fault has an azimuth of 18 degrees

E650300 N1112404 (nap) two faults with easterly and  westerly displacement . Faults have an azimuth of 187 degrees

E650306   N1112405 (Nap)  fault with  westerly displacement . Fault has an azimuth of 35 degrees

view looking south, displacement on all faults is down to the west.

E650333   N1112420 (Nap) fault with westerly displacement . Fault has an azimuth of 17 degrees. The water collecting in the fault gap may result in the slip planes being lubricated and initiate additional movement.
E650322   N1112413 (Nap) fault with westerly displacement . Fault has an azimuth of 219 degrees

close up of fault showing water collecting in the fault gap (plus garbage)

E650340 N1112426 (Nap) fault with westerly and easterly displacement . Fault has an azimuth of 350 degrees

Same fault looking north, water once again fills the fault gap.

E650353 N1112434 (Nap) fault with westerly displacement . Fault has an azimuth of 350 degrees
E650353 N1112436 (Nap) fault with westerly displacement . Fault has an azimuth of 306 degrees

E650407    N1112443 (Nap) fault with easterly displacement . Fault has an azimuth of 163 degreesE650520    N1112452 (Nap) fault with no vertical displacement . Fault has an azimuth of 210 degrees

E650528    N1112453 (Nap) fault with easterly displacement . Fault has an azimuth of 20 degrees

E650659    N1112491 (Nap) fault with westerly displacement . Fault has an azimuth of 258 degrees

Same west dipping fault, it is terminated by an east – west trending fault

Failed road, it has collapsed to the west and east
West – east fault, on south side is an east dipping fault

South dipping failure plane
South dipping failure plane
South dipping failure plane, tree roots indicate direction of motion

View looking south to the upper part of the slope failure
Main fault at the head of the slope failure

Main fault at the head of the slope failure

Horizontal slickenslides on the fault plane, downslope is to the right

 

Deformation on the downthrown side of main fault

View of the area of main failure, the displacement of the road illustrates the eastern edge of the failure , 30 August 2018

Toe of the slope failure on the coastline, pressure ridges are seen and the shoreline is clearly uplifted