All Tonga's mariners were alerted today to give the Tofua Volcano a wide berth while thermal anomalies continue to be observed. Vessels in the area should sail no closer than 1.08 nautical miles from Tofua today, 1 May, Tonga Geology Services (TGS) advised. The latest update from HIMAWARI-9 Satellite shows no ash/dust cloud has been released from the Tofua Volcano since the