{"id":16764,"date":"2022-01-18T03:19:44","date_gmt":"2022-01-18T08:19:44","guid":{"rendered":"https:\/\/ops.group\/blog\/?p=16764"},"modified":"2022-01-18T03:19:44","modified_gmt":"2022-01-18T08:19:44","slug":"tonga-major-eruption-in-the-south-pacific","status":"publish","type":"post","link":"https:\/\/ops.group\/blog\/tonga-major-eruption-in-the-south-pacific\/","title":{"rendered":"Tonga: Major Eruption in the South Pacific"},"content":{"rendered":"

On January 15, there was a major volcanic eruption in Tonga \u2013 an island nation in the South Pacific.<\/p>\n

It was perhaps the most explosively violent eruption of the 21st century to date. Since then, the volcano has continued to produce ash as high as FL630<\/strong> and has potential to continue to cause major flight disruptions throughout the region.<\/p>\n

Here\u2019s what you need to know.<\/p>\n

Where is it?<\/h4>\n

The Hunga-Tonga-Hunga-Ha\u2019apai<\/em> volcano, or just Hunga Volcano<\/strong> for short, is found approximately 30nm north of Tonga’s capital, Nuku\u2019alofa. You won\u2019t find it on maps because it is hidden underwater. It is nestled squarely within the Tonga Trench, and is part of the Pacific\u2019s infamous Ring of Fire \u2013 where eruptions and earthquakes come with the territory.<\/p>\n

Because it is submerged, the risk to airports in the region is actually two-fold \u2013 from ash<\/strong>, and from tsunamis<\/strong> caused by seismic activity under the sea.<\/p>\n

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The Hunga Volcano is found underwater, just to the north of Nuku’alofa, Tonga.<\/p><\/div>\n

What has been happening?<\/h4>\n

The Hunga Volcano has been stirring for a while. In December there were small eruptions which produced ash and disrupted flights at Tonga\u2019s main airport, NFTF\/Fua\u2019amotu<\/strong>. Then on January 15, there was a much more violent eruption.<\/p>\n

Hunga produced a large ash plume, 150 nm wide and extending up to FL630 well west of Tonga. \u00a0The remnant of this cloud is currently over New Caledonia. The current VAAC forecast is good<\/a>, with ash emission expected to stop.<\/p>\n

NFTF\/Fua\u2019amotu is currently closed due to ash on the ground,<\/strong> and is expected to re-open at 0630 local on Jan 21 (1730z on Jan 20)\u00a0but this may well be extended. \u00a0Airports nearby \u2013 especially in Fiji<\/strong>, New Caledonia<\/strong> and Vanuatu<\/strong> have so far escaped major disruptions.<\/p>\n

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Hunga’s ash plume reached hundreds of miles west of Tonga.<\/p><\/div>\n

Over the weekend, widespread Tsunami warnings caused by Hunga were issued for coastlines as far away as South America, the US and Japan<\/strong>. These have since been lifted, however Tonga itself was badly impacted by waves. It remains in a state of emergency and is still cut off from the world as internet and phone services are reportedly down. Reports of damage are still coming through.<\/p>\n

The majority of major airports in the South Pacific Islands are at or near sea-level which leaves them especially vulnerable to this threat. They are also very remote. If Hunga erupts again, widespread closures could happen with little notice.<\/p>\n

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Hunga’s Tsunami threat puts low level airports at risk throughout the South Pacific.<\/p><\/div>\n

Outlook<\/h4>\n

While things have started to subside since the eruption, it\u2019s not clear whether this was a one-off, or if we are in the middle of an \u2018eruptive sequence.\u2019 In other words, there may be more to come.<\/p>\n

Stay Updated<\/h4>\n

VAAC Wellington<\/strong> handles volcanic alerts for the South Pacific region. You can view new advisories as they are issued, here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

On January 15, there was a major volcanic eruption in Tonga \u2013 an island nation…<\/p>\n","protected":false},"author":49,"featured_media":16767,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1036,29,724,46],"class_list":{"0":"post-16764","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-briefings","8":"tag-nftf","9":"tag-south-pacific","10":"tag-tonga","11":"tag-volcano"},"_links":{"self":[{"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/posts\/16764","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/users\/49"}],"replies":[{"embeddable":true,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/comments?post=16764"}],"version-history":[{"count":9,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/posts\/16764\/revisions"}],"predecessor-version":[{"id":16780,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/posts\/16764\/revisions\/16780"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/media\/16767"}],"wp:attachment":[{"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/media?parent=16764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/categories?post=16764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ops.group\/blog\/wp-json\/wp\/v2\/tags?post=16764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}