一股不尋常的背景音 地球響起鈴聲?
#一股不尋常的背景音 #你有感覺到嗎
#專家說是神祕的地震波
#可能是岩漿體在地底分裂導致
『11月11日，整個地球搖晃了約20分鐘，沒有一個人感覺到。雖然我們知道「有發生什麼，但不知道那是什麼。」』
有人有感受到上述所言嗎？ 11/11怎樣倒是沒印象了，只是覺得好像超過一個禮拜；以前偶爾會感覺到，但不像這次那麼久。
我自己感受到的是，背景裡的高(頻)音，有一種振動，會觸及到腦腔、耳腔，全身；甚至血管裡的血好像被磁鐵吸到，有點緊箍的感覺。好幾天了，快一個禮拜，或更久。問其他人，有人也感受到，但會以為是否住家附近有人偷裝基地台，或任何與電器使用有關的問題，會頭痛，影響睡眠。
應該不算是裝神弄鬼的東西。恰巧看到兩篇文章，肯定很多人都感受到了。
專家記錄到的是地震波，但很不尋常，沒有傳統的主波副波，而且隱隱沒有發作。一般地震波是隆隆聲，但這次這股神祕的地震波像鈴聲。散開繞著地球好幾圈，呈現一種低頻單音，澄淨像音樂。
專家的推測是岩漿體，在地底裂開導致一座小島將產生。喔，還有，這一股地震波的起源，位在馬達加斯加島與非洲之間的島嶼。地圖上找不到，但振動的情形，遠到智利、紐西蘭、加拿大、甚至夏威夷。
附錄一
附錄二
https://www.rt.com/news/445171-weird-seismic-activity-mystery/
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※※※文章一※※※
11月11日，全球環繞著奇怪的地震波，地震學家正試圖找出原因
地震感應器首先發現起源於位在馬達加斯加與非洲之間一個島嶼，警鈴遠至智利，紐西蘭和加拿大。
夏威夷，幾乎在地球的另一邊，也連動到。
沒有人知道那是什麼。
隕石？地底的火山？核爆試驗？
「我不認為我之前看到這類的東西，」哥倫比亞大學地震學家Göran Ekström接受國家地理雜誌採訪時說。「不代表，最終，它們的成因是奇特的。」
環繞著神秘的中心是馬約特島，位於非洲和馬達加斯加之間。自5月以來，受一系列地震的影響。大多蠻小的，但最大的一次在5月8日，是島上有史以來最大的一次，達到5.8級。
但在本月稍早偵測到神祕的鈴響前，這一系列地震群已經消退了。
Ekström專門研究異常地震指出，關於11月11日的事件很奇怪。很像這個星球響起鈴聲，傳播時保持在一個低頻單音裏頭。
地震本質上通常是短暫的『裂開』。隨著地殼裡的張力突然綻放，可清晰辨認地震波脈衝從裂開處往外散開。
第一個信號稱為主波：高頻壓縮波，以束狀輻射。
第二個副波：這些高頻波往往會『擺動』更多。
只有到那時才出現表面波：緩慢而深沉的隆隆聲持續徘徊，並且會繞著地球轉好幾次。
11月11日所發生的值得注意，因為沒有探測到主波或副波。
所有紀錄到的都是深沉共振的表面波。而且不像地震的表面波那樣『隆隆』。 而是保持在一個更澄淨幾乎像音樂的頻率。
據國家地理雜誌的報導，法國的地質調查局，懷疑有一座新的火山，可能正在馬約特海岸附近發展出來。雖然這座島嶼是由火山活動造成的，但它已經蟄伏了4000多年。
法國認為這個奇怪的鈴聲可能是岩漿活動所產生，在距離海岸50公里的深水處。這是由GPS感應器檢測到，馬約特島在不到五個月的時間，往東南移動了約5公分。
但它在地圖上不清楚。確切說海洋之下所發生的也只能用猜的。
Ekström認為是岩漿在裏頭晃動，或被迫穿過地底岩石裂縫所引起的不尋常清澈訊號。
但他不確定。
※※※文章二※※※
11月11日，整個地球搖晃了約20分鐘，沒有一個人感覺到。雖然我們知道『有發生什麼，但不知道那是什麼。』
地震事件發生在大約9:30 UT，在法國一個小島，靠近非洲東南沿海的馬達加斯加附近。
這一波地震波遠及智利，紐西蘭和加拿大，最終到達距離11,000英里以外的美國夏威夷。地震愛好者@matarikipax向Twitter發布了異常活動的圖像。
哥倫比亞大學地震學家Göran Ekström，在接受國家地理雜誌採訪時說：「我不認為我之前看到這類的東西。」「不代表，最終，它們的成因是奇特的。」
正常地震是短暫，突然的顛簸，通常幾秒鐘內消退，接著有餘震會持續更長時間。經由這些標準地震的更迭中，產生三種類型的波。
地震通常會觸發快速散開的信號，稱為初波，緊跟著是相對較高頻率的副波。
第三是較長的表面波，在大地震之後會數次擴及到全球。這類的波與馬約特的神秘信號非常相似，但沒有地震記錄，會引發所觀察到這樣的奇怪低頻。
南安普頓大學的地震學家Stephen Hick解釋說：“這是一種乒乒聲，不是隆隆聲。」
然而，馬約特所發生的波引發出令人驚訝的單一低頻信號，進一步讓科學家們感到迷惑，波是單色的，大概17秒重複一次，跟標準地震所發出的嘈雜波迥然不同。
大多數理論指出，去年5月開始，一支搖晃馬約特島的地震群，在大約31英里遠的海岸發生數百次地震，在奇特搖鈴聲源的東邊。但是最近沒有地震紀錄，近幾個月地震活動的頻率也消退，這樣的神秘現象更加讓科學家感到困惑。
目前的工作理論是，有一個大約一立方英里的岩漿體，在馬約特島的地底擱淺，可能導致水下岩漿室坍塌。其他的想法則以為是所謂的『慢地震』，比傳統的安靜，可持續數分鐘，數小時甚至數天，是神秘信號背後的原因。
https://www.rt.com/news/445171-weird-seismic-activity-mystery/
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原文連結
ARTICLE I
Strange seismic waves were picked up circling the globe on November 11, and seismologists are now trying to figure out why
Seismic sensors first picked up the event originating near an island between Madigascar and Africa. Then, alarm bells started ringing as far away as Chile, New Zealand and Canada.
Hawaii, almost exactly on the other side of the planet, also picked up the ‘event’.
Nobody knows what it was.
Meteorite? Submarine volcano? Nuclear test?
“I don’t think I’ve seen anything like it,”National Geographic reports Colombia University seismologist Göran Ekström as saying. “It doesn’t mean that, in the end, the cause of them is that exotic.”
At the centre of the mystery is the tiny island of Mayotte, positioned about half way between Africa and Madigascar. It’s been subjected to a swarm of earthquakes since May. Most have been minor, but the biggest — on May 8 — was the largest in the islands recorded history, topping magnitude 5.8.
But, the earthquake swarm had been in decline before the mysterious ringing was detected earlier this month.
Ekström, who specialises in unusual earthquakes, points out much about the November 11 event was weird. It was as though the planet rang like a bell, maintaining a low-frequency monotone as it spread.
Earthquakes, by their very nature, usually register as short-sharp ‘cracks’. As tensions in the Earth’s crust suddenly release, pulses of clearly identifiable seismic waves radiate outwards from where the slippage occurs.
The first signal is called a Primary wave: high-frequency compression waves that radiate in bunches.
Then comes a Secondary wave: these high-frequency waves tends to ‘wiggle’ somewhat more.
Only then comes the surface waves: these slow, deep rumbles tend to linger, and can circle the Earth several times.
The November 11 event is notable in that no Primary or Secondary waves were detected.
All that registered was the deep, resonate surface wave. And it didn’t ‘rumble’ as an earthquake’s surface wave tends to. Instead, it maintained a much cleaner — almost musical — frequency.
National Geographic reports the French Geological Survey suspects a new volcano may be developing off the coast of Mayotte. While the island was created by volcanic activity, it’s been dormant for more than 4000 years.
The French believe the weird ringing may have been generated by a movement of magma some 50km off the coast and under deep water. This is supported by GPS sensors detecting Mayotte has moved some 5cm to the southeast in less than five months.
But it’s a poorly mapped region. Exactly what’s beneath the ocean’s can only be guessed at.
Ekström believes the unusually pure signal could have been caused by magma sloshing about inside a chamber, or being forced through a gap in the subsurface rocks.
But he’s not certain.
ARTICLE 2
On November 11, the entire planet shook for roughly 20 minutes and yet not a single human being felt it. Though we know ‘it’ happened, we still have no idea what ‘it’ was.
The seismic event began at approximately 9:30 UT, roughly 15 miles off Mayotte, a French island located near Madagascar off Africa’s southeast coast.
The seismic waves from this event travelled as far as Chile, New Zealand and Canada, and eventually reached the US state of Hawaii some 11,000 miles away. Earthquake enthusiast @matarikipax posted images of the anomalous activity to Twitter.
“I dont think Ive seen anything like it,” Columbia University seismologist Göran Ekström told National Geographic, before cautioning: “It doesnt mean that, in the end, the cause of them is that exotic.”
Normal earthquakes are short-lived affairs that produce a sudden jolt that typically subsides in seconds, followed by aftershocks which can last far longer. Throughout these standard seismic shifts, three types of waves are produced.
An earthquake will usually first trigger fast-travelling signals known as Primary or P-waves followed by relatively high frequency secondary or S-waves.
Thirdly, long-period surface waves travel around the globe multiple times following a big enough earthquake. While this type of wave most closely resembles the Mayotte mystery signal, there was no earthquake recorded that could have triggered such a bizarre low frequency in the way observed.
“A sort of ping rather than a rumbling,” explains Stephen Hicks, a seismologist at the University of Southampton.
However, the Mayotte event triggered a surprisingly monotonous and low-frequency signal which further mystifies scientists; the wave was monochromatic and took roughly 17 seconds to repeat – completely different to the noisy waves emitted by standard earthquakes.
Most theories point to a seismic swarm that has rocked Mayotte since last May, with hundreds of quakes registered from an area roughly 31 miles offshore, east of the source of the odd ringing. However, 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. Additional ideas suggest that what is known as a slow earthquake, which is quieter than its traditional namesake and can last minutes, hours or even days, is what is behind the enigmatic signal.
https://www.rt.com/news/445171-weird-seismic-activity-mystery/