The scientists published their findings (opens in new tab) online April 14 in the journal Science Advances. The damage from the event 500 years ago had been erased."įuture research should focus on the best way to place sensors to record data from submarine volcanoes and the coastlines of vulnerable islands as "an effective means of keeping tabs on submarine volcanoes," Purkis said. "Archaeological evidence pins a major tsunami in the mid-15th century with runup heights up to 30 meters - that is, similar in size to the 2022 event." However, "when I surveyed the coral reefs of the Tongan archipelago with the Living Oceans Foundation in 2013, we found the reefs to be healthy and vibrant. Still, "clearly the reefs can recover from such damage," Purkis noted. It is equal to exactly 1.609344 kilometers per hour. A mile per hour is a unit of speed commonly used in the United States. This finding suggests these reefs may have experienced substantial damage, Purkis said. Something traveling at one foot per second is traveling exactly 0.3048 meters per second, or about 0.682 miles per hour. The computer simulations also revealed that the coral reefs that fringe the Tongan islands helped suppress the waves that ultimately made their way to shore. Scientists find strange underwater volcano that 'looks like a Bundt cake' Tonga's eruption injected so much water into Earth’s atmosphere that it could weaken the ozone layer Tonga's massive volcanic eruption wiped out unique, never-before-seen life-forms ![]() The eruption's relatively distant location from urban centers also may have saved Tonga from a worse fate, the scientists noted. The low death toll is a testament to the effectiveness of safety drills and awareness efforts carried out in Tonga in the years before the eruption, Purkis said. In contrast, the 2022 eruption killed an estimated six people. The scientists said the strength of the 2022 eruption rivaled that of the 1883 eruption of Krakatau that killed more than 36,000 people. ![]() "A series of small blasts hailed the arrival of the big one, which generated the largest tsunami." "We show how submarine volcanic eruptions can generate massive tsunami," Purkis said. This, in turn, helped generate a mega-tsunami that lasted more than an hour. The scientists found that the complex, shallow nature of the region's underwater terrain helped to trap low-velocity waves from the eruption. Table showing various mile per hour measurements converted to feet per second.The Hunga Tonga-Hunga Ha'apai volcano on December 24, a month before the eruption. Mile per Hour to Foot per Second Conversion Table ![]() The velocity in feet per second is equal to the distance in feet divided by time in seconds. For example, ft/s is expressing a change in length or distance relative to a change in time.įeet per second can be expressed using the formula: In the expressions of units, the slash, or solidus (/), is used to express a change in one or more units relative to a change in one or more other units. For example, 1 foot per second can be written as 1 ft/s, 1 ft/sec, or 1 fps. Feet per second can be abbreviated as ft/s, and are also sometimes abbreviated as ft/sec or fps. foot per hour ft/h meter per second 8.46667E-05 foot per minute ft/min meter per second 0.00508 foot per second ft/s meter per second 0.3048 inch per minute in/min meter per second 0.000423333 inch per second in/s meter per second 0.0254 kilometer per hour km/h ( kph) meter per second 0. The foot per second is a US customary and imperial unit of speed. Feet per second are a measurement of speed expressing the distance traveled in feet in one second.
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