To all of my readers on the East Coast, I send out a heartfelt wish for your safety and a swift return to normalcy. I hope you are not without power. Be safe!
To those who have opened up a discussion about the tsunami warning in Hawaii, I offer the following thoughts. One reader, TC, happened to be on Maui during the tsunami warning and asked if the level of panic observed is normal here.
When you live on Maui for a while, the enormity of being a spec in the middle of the ocean grows. It feels a bit like being a flea on an elephant. We are the farthest from any landmass of any Archipelago. (Not just Hawaii, but Maui.) For those who have lived through dock strikes, or a hurricane, or a tsunami, it becomes readily apparent how dependent we are on the outside world for absolutely everything, from toilet paper to rice, to bottled water.
A fire alone can shut down the whole west part of the island. I’ve seen it happen. There is no getting in or out, because there is only one road in, and they now close down the northern route so it will not become clogged with people and cut off emergency vehicle access. More than once I had to get a hotel room and sleep on the west side when I couldn’t get home from work, due to a disaster.
People are very attuned to this when authorities say a tsunami is coming. They immediately picture no electricity, no food, no ships getting in with supplies for God knows how long. The thing about a tsunami is that there is essentially no warning. An hour or two maybe, and then it’s a call to evacuate. Tsunamis travel at 500 mph plus-the same speed as a jet. There is little response time, no planning ahead.
Mike was a fireman on Oahu for 12 years and amazingly, spent less time fighting fires than he he did rescuing people from the ocean, and on occasion, from big waves washing over people’s houses. That’s just what the North Shore is like in the winter time. He says the level of panic of people fleeing during a tsunami warning also has to do with responsibility. Responsible people realize that if they don’t act, they are jeopardizing the life of someone else (such as Mike) who must then come in and rescue them.
One disconcerting fact that came out during the news reports on television for this tsunami warning: there are no buoys between Hawaii and the mainland. None. So when the earthquake struck Canada and reverberated out, they had nothing to look at to check the rising tide between us and them. So we had to prepare for the worst.
The following facts are from this good website: http://ptwc.weather.gov/faq.php#6
1. How fast do tsunamis travel?
Tsunami wave speed is controlled by water depth. Where the ocean is over 6,000 meters (3.7 miles) deep, unnoticed tsunami waves can travel at the speed of a commercial jet plane, over 800 km per hour (500 miles per hour). Tsunamis travel much slower in shallower coastal waters where their wave heights begin to increase dramatically.
2. What does a tsunami look like when it reaches the shore?
As the leading edge of a tsunami wave approaches shore, it slows dramatically due to the shallower water. However, the trailing p art of the wave can still be moving rapidly in the deeper water. This results in a “piling up” of the tsunami energy, and the tsunami wave height grows. The wave looks and acts like giant river of water on top of the ocean that floods the shore.
3. Where and how often do tsunamis usually occur?
Major tsunamis occur about once per decade. Based on historical data, about 59% of the world’s tsunamis have occurred in the Pacific Ocean, 25% in the Mediterranean Sea, 12% in the Atlantic Ocean, and 4% in the Indian Ocean.
Stay safe, and treasure each day. If you are a reader on the East Coast, please let me know you’re okay!
“The best way to predict the future is to invent it.” Alan Kay
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