Skip to main content
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Analog field-scale acoustic study of volcanic eruption directivity using a tiltable liquid nitrogen-charged water cannon

Fig. 1

Map (a) showing experimental setup and distribution of sensors (squares colored red for northeast sensors, blue for southwest sensors, green for sensors lateral to the discharge direction and black for a sensor under the cannon). The angled blast direction is shown by the black double arrow. Latitude and longitude are given in decimal degrees. Cameras (V open to the look direction) documented 10 successful discharges. The black star shows the cannon. For each experiment, the bottle (b) was partially filled with liquid-nitrogen, sealed with the cap and placed in the partially water filled barrel (see “Experimental setup” section). Diagram showing the discharge apparatus within the barrel shown in c. An example discharge (d) for Experiment 11 yielded a lateral discharge of a water/nitrogen mixture. Colored balls aided assessment of discharge exit velocities. Images (b, c) are from video captures generated by Julian Thompson (GNS Science)

Back to article page