Fig. 7
![Fig. 7](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-018-0938-x/MediaObjects/40623_2018_938_Fig7_HTML.png)
VLPs location. a Epicentral (blue ellipse) and b depth location for the 3 VLPs recorded at Kawah Ijen and c epicentral (blue circle) and d depth location for the first VLP observed at White Island. The locations are carried out using particle motion analyses [shown in white in (a) and (c), in black in (b) and (d)]. A surface correction is applied following Neuberg and Pointer (2000). At White Island we also applied the waveform semblance method (Jolly et al. 2017)