If you want to map the boundaries of the lava flow, take the contour profiles you made from each latitude line between 45° 55.6' and 45° 56.0', and mark the east and west boundaries of the new lava flow (the red area) along the corresponding line of latitude on the POST-event map. Then connect the marks on the map, roughly following the contour lines, to define the boundary and extent of the new lava flow.

What is the maximum width of the new lava flow?

What happened as the lava flow encountered obstacles, such as pre-existing hills?

In the next activity we will look at the data that the rumbleometer recorded.