Results for Tonga Geological Services

There was no tsunami threat from a Magnitude 6 earthquake, centred 136 km west of Neiafu, Vava'u, and north west of Ha'apai at 4:03am today, 16 December, the Tonga National Tsunami Centre reported.

A total of 118 earthquakes were detected within the Tonga region in September. Due to upgraded earthquake detectors, Tonga Geological Services is recording an average number of 100 earthquakes monthly - twice as many as before they had the equipment. "It does not mean that more earthquakes are happening, but that we are getting more data and detecting more earthquakes," said TGS officer, Mele Manu.

There have been no new ash emissions recorded at the Home Reef volcano as monitoring continues, the Tonga Geological Services (TGS) reported today, 1 July. TGS advises all Mariners to sail beyond a safe distance of 4 km from Home Reef until further notice.

The Home Reef volcano is showing a decrease in it's Volcanic Radiative Power (VRP) as detected by the MODIS-MIROVA satellite, with the most recent thermal anomaly observed at 8:06am, Tonga Geological Services reported today, 24 June.

A volcanic hazard alert issued by Tonga Geological Services tonight, warns all mariners to sail no closer than 4km from the Home Reef Volcano, which has exhibited ongoing volcanic activity suggesting that a new batch of magma is rising in the volcano's feeder pipe. The volcanic activity poses low risk to the Vava'u and Ha'apai communities.

The Tofua volcano monitoring continues, with Tonga Geological services (TGS) reporting today, 13 May, that four jump events were recorded since the last report yesterday morning, with the most recent event at 05:46 AM.

The aviation community was issued a Yellow ACC alert to be vigilant today while magmatic activities on Tofua volcano are continuing. There were a total of 13 events recorded over the last 24 hours, additional to the seven events in the previous report, the Tonga Geological Services, reported today, 3 May.

An ash cloud was observed being emitted from the Tofua Volcano rising to a height of 4km - 6km on Sunday 29 April 2024 at 10:00pm, and recorded by the Japanese weather satellite HIMAWARI-9. Tonga Geological services reported that the volcanic activity, which commenced on Friday, 26 April, has exhibited an unusual pattern, with continuous monitoring revealing fluctuation in event frequency. A Marine Hazard Alert was issued today advising all Mariners to sail beyond 1.08 nautical miles from Tofua Volcano until further notice.

A 5.8 magnitude (Mw) earthquake was felt by the people of Niuatoputapu at 1:29pm today, 27 July. There was no tsunami threat or damage. Last month there were 155 seismic events over 4Mw in the Tonga region.