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Science and Innovation National Geographic November 28th 2018
Strange waves rippled around the world, and nobody knows why
Instruments picked up the seismic waves more than 10,000 miles away—but bizarrely, nobody felt them.
The seismic waves began roughly 15 miles off the shores of Mayotte, a French island sandwiched between Africa and the northern tip of Madagascar. The waves buzzed across Africa, ringing sensors in Zambia, Kenya, and Ethiopia. They traversed vast oceans, humming across Chile, New Zealand, Canada, and even Hawaii nearly 11,000 miles away.
Was it a meteor strike? A submarine volcano eruption? An ancient sea monster rising from the deep?
“I don't think I've seen anything like it,” says Göran Ekström, a seismologist at Columbia University who specializes in unusual earthquakes.
“It doesn't mean that, in the end, the cause of them is that exotic,” he notes. Yet many features of the waves are remarkably weird—from their surprisingly monotone, low-frequency “ring” to their global spread. And researchers are still chasing down the geologic conundrum.
no quakes have been recorded recently and the frequency of seismic activity has subsided in recent months, further confounding scientists investigating this mysterious phenomenon.
The current working theory is that there is a magma body, roughly a cubic mile in size, that is shunting its way through the subsurface of Mayotte and may have caused a subaquatic magma chamber collapse.
originally posted by: The angel of light
edit on th31154575502025232018 by St Udio because: (no reason given)
Mount Etna, towering above Catania, Sicily's second largest city, has one of the world's longest documented records of historical volcanism, dating back to 1500 BC. Historical lava flows cover much of the surface of this massive volcano, which makes it the highest and most voluminous in Italy. Ever since ancient times, the volcano seems to have been in near-constant activity. It is considered, after Kilauea on Hawaii, the second most active, i.e. productive volcano on earth.
Eruptions since 1950 (f: flank / s: summit activity): 1950 (s), 1950-51(f), 1955 (s), 1956 (s), 1956 (f), 1957 (s),1960 (s), 1961 (s), 1964 (f), 1964 (s), 1966 (s), 1966-1971(s), 1968 (f), 1971(f), 1972-1973 (s), 1974 (f), 1974-1975 (s), 1975-1977 (f), 1977-1978 (s), 1978 (f), 1979(s), 1979 (f), 1980 (s), 1981 (s), 1981 (f),1982-1983 (s), 1983(f), 1984(s), 1985(s), 1985(f), 1986(s), 1986-1987 (f), 1987(s), 1988(s), 1989(s), 1989(f), 1990 (s), 1991-93(f), 1995(s), 1996(s), 1997 (s), 1998 (s), 1999 (s), 2000 (s), 2001(s), 2001 (f), 2002(s), 2002-03(f), 2004-2005 (f), 2006 (s), 2007 (s), 2008-2009 (f), 2010(s), 2011-2013(s), 2014-ongoing(f)
Although meteor detection is our main 24/7 activity, we also carry out other experiments including direct monitoring of solar RF radiation and signals from other stars and planets such as Jupiter (NASA JOVE project).
Italy's Mount Etna on the island of Sicily has had historically recorded eruptions for the past 3,500 years and has been erupting continuously since September 2013 through at least March 2018. Lava flows, explosive eruptions with ash plumes, and lava fountains commonly occur from its major summit crater areas that include the North East Crater (NEC), the Voragine-Bocca Nuova (or Central) complex (VOR-BN), the South East Crater (SEC) (formed in 1978), and the New South East Crater (NSEC) (formed in 2011). A new crater, referred to as the "Cono della sella" or CdS, emerged during early 2017 in the saddle between SEC and NSEC (figure 206).
INGV reported that during 3-9 December activity at Etna was characterized by gas emissions at the summit craters, with periodic Strombolian activity from vents in Bocca Nuova, Northeast Crater (NEC), and New Southeast Crater (NSEC). Strombolian explosions at the cone in NSEC became more frequent on 4 December. In addition, lava effusion became continuous with small overlapping flows traveling about 500 m down the E flank of the cone. Incandescent blocks generated by the lava flows rolled to the base of the cone, and occasional small collapses produced minor ash plumes. Strombolian activity and occasional ash emissions were characteristic of vents in the W part of Bocca Nuova’s (BN-1) crater floor. Gas emissions at Voragine Crater continued from a vent on the E rim of the crater, and Strombolian explosions were evident at NEC.
The Catania Section, now formally renamed "Osservatorio Etneo" (Etna Observatory), is a public scientific institution belonging to the Istituto Nazionale di Geofisica e Vulcanologia (National Institute of Geophysics and Volcanology, I.N.G.V.), which carries out research, monitoring and surveillance in the fields of geophysics and volcanology. This section of the I.N.G.V. was born from the fusion of the former Istituto Internazionale per la Vulcanologia (International Institute of Volcanology, founded in 1969) and the more recent "Sistema Poseidon", following the Legislative Decree no. 381 of 29 September 1999, which declares the I.N.G.V. the reference institution for seismic and volcano monitoring and surveillance in Italy.
Not really. Anak Krakatau experienced a submarine landslide because it has been continually building itself up, in the sea, meaning very steep underwater slopes. Etna, not so much.
that is precisely what Etna is in very clear risk to experience too.
3) An Increase in High Magnitude Earthquakes
Jesus said several signs will increase like birth pains before He returns (Matthew 24:8). This means those signs will increase in frequency and intensity before the Second Coming. One of the signs Jesus cited is earthquakes (Matthew 24:7). As mentioned in my book Signs of the Second Coming, we've seen a marked increase in the frequency of high intensity earthquakes over the past two decades.
From 1900 to 1950, the world only registered six 8.0 magnitude earthquakes. Since 2010, we've had ten. Earlier this year, more than 70 earthquakes hit the Pacific Ring of Fire in a 48-hour period. …