The Soufriere Hills volcano is monitored using a variety of techniques ranging from the latest microwave radars to more traditional survey techniques, like Electronic Distance Measurements. With EDM it is possible to detect small changes in the size of the volcano caused by the injection or withdrawal of magma into the edifice. Here, a MVO scientist is changing the EDM reflectors on top of Gages Mountain, just a few hundred metres from the volcano. Although not visible in this view, the steam and gas plume billowing off the dome in the background is a reminder that the volcano is just resting. Working this close to the volcano, one must always keep one eye on the volcano, just in case...

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