Thunder Megaphone – A Glacial Valley Can Focus and Amplify Thunder Into a Most Extraordinary Sound

We’ve all heard thunder, and we all know what causes it. Many of us have heard two distinct kinds of thunder, but perhaps we never really noticed or thought about it. Recently, I heard a third kind of thunder.

“Ordinary” thunder – a thoroughly extraordinary sound, but the kind of thunder we hear most often – happens when lightning occurs at some distance from the observer. The initial sound of the lightning bolt echoes off surrounding objects and air masses. Because it is echoed so many times, the thunder stretches out into many, many seconds, even though the initial sound might have lasted a second or two at most. Moreover, because the initial sound echoes off soft things with indistinct surfaces – clouds, thermoclines, and weather fronts – and because many echoes reach the ears of the observer at different times, the original sound is greatly distorted. Almost all high frequency components are filtered out, and the observer hears mostly a low-pitched rumble.

When lightning strikes very close to the observer, within a few hundred feet, the sound is entirely different. The observer might not hear echoes of the thunder at all, but only the pure initial sound. It is a single, sharp, intense “POW!” It may be followed by a much quieter, but still loud, whistling or hissing sound.

But what about that third kind of lightning?

I was camping alone in Crawford Notch State Park in northern New Hampshire, when thunderstorms began rolling into the valley just after dinner. I tidied up my campsite just before the rain started, then retreated to my tent. One thunderstorm passed without much incident.

Darkness had fallen by the time the second thunderstorm rolled up from the south. I occupied myself by counting the time interval between lightning and thunder to track the movements of the storms. Fifteen seconds before the thunder rolled up from somewhere west of Mount Bemis, and I knew the storm was just under three miles southwest of me. Seven seconds between the flash and the rumble beyond Frankenstein Cliff, and I knew the storm was passing nearly a mile and a half to my west.

And then it happened!

A flash. I counted eleven seconds. And I heard a sound unlike any thunder I had ever heard before.

The cacophony included at least half a dozen rapid repetitions of the “POW!” of a nearby lightning strike. But at the same time, there was the rumbling and roaring of “ordinary” thunder, but much, much louder than usual.

Before I could figure out what that sound was, there was another flash somewhere to the north. Again I counted eleven seconds, and again I heard that utterly incredible crackling and powing and rumbling and roaring.

This time, I figured it out.

It was a lightning strike right within the upper reaches of Crawford Notch just a couple of miles north of me. It was right within a gigantic stone megaphone formed by Webster Cliff on the east, Mount Field and Mount Willey on the west, and the old glacial cirque of Mount Willard for a backstop on the north.

And this 1,500 foot deep, three-mile-long granite megaphone was pointed right at Dry River Campground.

Yes, the beautiful U-shaped glacial valley of Crawford Notch is a nearly perfect megaphone, albeit open on top. The bare stone faces of Mount Willard and Webster Cliff echoed the initial “POW!” of the thunder almost undistorted. The western slope of the notch is a bit more heavily wooded, but there’s enough bare ledge and rockslide there to provide a pretty good echo. The open top of the notch was covered by the underbelly of the thunderstorm itself, which provided enough of a soft echoic surface to create the usual rumbling of thunder in addition to the clean “POW!” echoes off the rock faces.

But all of this sound was extraordinarily loud because of the megaphone that focused it all right on me and my campsite.

After I got this all figured out, there was a third lightning flash in the north. Yes, eleven second later, there was that glorious, unearthly sound again.

I wondered why I had never heard this kind of thunder before. I have probably experienced thunderstorms in Crawford Notch at least a dozen times over the years, but never heard the Thunder Megaphone.

My best guess is that I probably have heard it before, but never noticed it. Most of the times I’ve camped there, it was with a crowd of friends and family. Much goes on when a thunderstorm rolls in. Ponchos have to be broken out and put on, while at the same time, various disorderly what-nots need to get stashed into cars and tents before they get soaked. There is a bit of yelling and shouting to be done, and paradoxically among the mayhem, kids and dogs need to have their fears calmed. Meanwhile, tarps over the tents and picnic tables are flapping in the gales, making a poor imitation of thunder themselves.

In all my 25 years camping in Crawford Notch, this may have been the first time I experienced a thunderstorm while I was camping there alone. There was no tarp over the tent, and I had anticipated the thunderstorm well enough to get everything into the car long before the rain started.

So, when the lightning and thunder came, I had nothing to do but observe.

What a treat!

I half hope we get a thunderstorm the next time we go camping in the mouth of the Thunder Megaphone.

Teenage Weight Loss – How Teenagers Can Safely Lose Weight

Teenagers with body mass measures between 25 and 30 require immediate medical attention. The internal stress caused from so much weight almost guarantees the premature development of medical problems such as diabetes, heart disease, cancers, and stroke.

There's no question that aggressive weight loss methods are necessary and these teenagers need to be followed by medical experts for years to come. But what about teenagers with body mass measures just below 25? Is it safe for this group of overweight and mildly obese teenagers to lose weight?

The verdict is still out – the weight loss community continues to wait for more evidence supporting aggressive weight loss methods for overweight teens. I say while we wait, let's lose some weight.

But we do not need to be so aggressive with this group. Overweight teens need to lose weight, but in a slow, gradual process. Lasting weight loss and the development of positive habits should replace the push for immediate weight loss in adolescents with body mass measures between 22 and 25.

The there's the teenager wanting to lose weight for purely cosmetic reasons. How do we approach this fragile situation as parents and professionals? We can not just say no to her for fear she might turn to unhealthy means to lose weight. But we can not just give him a green light and say go for it, either.

The rest of this article focuses on the cosmetic teenage weight loss dilemma. The best thing I can do is at least provide some ground rules for teenagers with body mass indices less than 22 who insist on losing weight.

Cosmetic Teenage Weight Loss – The Ground Rules

Here's a simple, straight forward list of ground rules for teenagers wanting to lose weight for cosmetic reasons:

  1. Losing weight with a body mass index less than 19 is not recommended and might even be harmful. Things like eating disorders, endocrine abnormalities, stunted growth, and anorexia are all well documented consequences from unnecessary teenage weight loss.
  2. Teenagers with body mass measures between 20 and 22, can lose 5 to 10 pounds in a safe and effective manner.
  3. The primary mechanism for teenage weight loss is always the "burning" of excess calories through increased physical activity. A combination of aerobic exercises and resistance training works fast and produces the best results.
  4. Teenage weight loss by restricting calories should be kept to a minimum. A slow, gradual, and controlled restriction of calories is key. I recommend starting with a 5% reduction of calories from baseline for two weeks. This is followed by a 10% reduction for one week and then a 15% reduction (if necessary) for one week.
  5. Dedication to a consistent exercise program typically produces the weight loss desired without any changes to the caloric intake. A more natural way to reduce calories comes from eating a more balanced and nutritious diet, including more servings of fruits and vegetables.
  6. Emphasizing consistent exercise and a nutritious diet is often all that is needed for a teenager to drop some weight, firm and tone muscle, and achieve her "cosmetic" goals.

For the actual steps to safe and effective teenage weight loss, additional information on resistance training, and guidelines for restricting calories, use this link …

Teenage Weight Loss Plan

To Healthy Living!

Michael A. Smith, MD

Chief Medical Consultant

Diet Basics Website

Productive Search Engine Optimization – A Step Forward to Successful Search Engine Optimization

If you have a web site, what could be your concentration so that your web site will become popular in the Internet? Search engine optimization should be your main focus. It could help you get the traffic that you wanted so that you would be able to make big bucks on your web site. If you are "searchable" then you are in for this business. All you have to do is maintain that one and you would just see how your web site becomes successful.

Here are some tips so that you could be a step forward to successful search engine optimization.

1. You can submit your web site to search engines manually. But then there are some considerations that you need. Your web site's pages should be completely finished since search engines will not pay any attention for unfinished web sites. You should not also be a spammer meaning you should not be using keywords on your web site just for the sake of having them. Use keywords appropriately.

2. Web spiders are also looking for keywords so they can rank your web site. You need to target the keywords you want and make sure that you have them on your content. They should be used appropriately since over usage of keywords would drive away web spiders.

3. Make sure that you have other links to and from your site. The more links to your site, the better. You would be able to get a lot of targeted traffic if your web site is accessible to these visitors. You can exchange links with other sites but preferably exchange links with sites that have already established traffic.

4. You can also add in a forum on your site. If you have an area where where visitors can actually interact, time will come that more and more people would want to be involved in the discussion. Of course, this traffic is what you need to be on the top page rank.

Learning Spanish Courses – For Work Or Play

Learning a language, especially Spanish can be one of the most rewarding experiences ever. I have put together a few tips on surviving the Spanish language course.First of all, if you have ever decided on learning Spanish or you think it’s time to knuckle down and finally learn Spanish, you are in luck because there has never been a better time to learn it. More and more countries are accepting Spanish on their school curriculum’s as there are more Spanish speakers venturing to other countries seeking out new lives. If you do not want to “miss the boat” as it were, now’s the time to study Spanish.

Below I’ve made some bullet points on learning Spanish effectively.

Why learn Spanish in the first place

First of all, before you begin your classes it would be a good idea to know your exact reasons for wanting to learn the language. Is it for work or play? In other words, do you need it in your job or is your learning Spanish more orientated to towards leisure or culture? So many people are finding better employment these days as a direct result of learning a language such as Spanish. The opportunities that exist are literally endless – translation, catering/restaurants, government and civil servant jobs to name but a few. I’m quite sure your boss will appreciate you that much more too, let alone your personal finances! Yes, having another language is a tool that helps you earn more money and that can’t be bad, can it? Also, your boss will be inclined to promote you as you will be an invaluable asset to his or any company.

If you have motives other than your job or career then I’m sure you’ll find learning Spanish a rewarding hobby. Just think about being able to converse with your new neighbors in Spanish! How welcome you’d make them feel by chatting to them in their native language. Imagine impressing your family and friends by ordering your next meal at a Mexican or Spanish restaurant in fluent Spanish.

Learning because of love

Maybe you’ve set your heart on learning the Spanish language because of love. Maybe you have met the girl or boy of your dreams and the language barrier has reared its ugly head. What a fine and noble opportunity to learn your future mate’s language and converse properly with them. One of the best methods to learn Spanish today is by using one of the very many online Spanish course methods. There are a few good ones on the internet today and they are all highly recommended for learning the language.

So whether it’s to improve your career, to enrich yourself culturally or even love then you could hardly go wrong in starting out on the right foot with an online Spanish course.