Seismologist David Love from PIRSA says most of our quakes don't follow faultlines, so there's no point reaching for a map.

A SEISMIC expert says Friday night's earthquake is a portent of things to come and that another "1954-style earthquake" is certain to hit the city.

"The truth of the matter is that the earthquakes occur all over the place, regardless of where the faultlines ," he said.

"It's somewhat different from California, where you can see most of the earthquakes happen on major faultlines that they know are moving."

The South Australian earthquakes are "spread out far and wide", though there are "more on the hills than on the flats".

Dr Love said it was quite common for people to be able to hear and see an earthquake without feeling it. He said the earthquake compression waves were equivalent to sound waves. As the waves come up through the ground it is possible to hear low-frequency sound waves.

"It does sound like a rumbling as it comes and goes," he said.

"When you are closer it tends to be more a big boom sound, but what people actually hear is a probably a little subjective and probably depends on where they are and what they are doing."

People were jolted from their sleep when a magnitude 3.8 quake - the state's strongest in more than 20 years - struck just south of Mt Barker at 11.27pm on Friday. Its shockwaves were felt across the state.

It was the largest of four tremors that had struck close to Adelaide in the past 19 days, with three recorded near Kuitpo, including a 1.9 magnitude tremor on April 2.

Australian Seismological Centre director Kevin McCue said it was only "a matter of time" before SA experienced a repeat of the 5.5 magnitude quake of 1954 that caused $70 million damage across Adelaide.

"I think we probably haven't seen the worst yet, but the probability would be pretty small that it will happen in our lifetime," he said.

"But in places like Adelaide, very few buildings are designed to resist earthquakes.

"A 1954-style earthquake will happen at some stage in the future and Adelaide will be damaged. It's just a matter of time."

Mr McCue said SA experienced at least one magnitude 3.8 quake a year, and Adelaide faced the greatest risk of earthquake damage out of any major capital city due to its large number of volatile fault lines.
He said Friday's quake was a call to communities and authorities to be better prepared in the event of a more destructive tremor.

"This is the fourth relatively small earthquake in just a few weeks, which is unusual," he said.

"This earthquake was possibly up to a magnitude of even four and it's only the depth (of the quake) that saved you from damage.

"I think at the moment there is a high probability of an earthquake in this same area of the Adelaide metropolitan area.

"I think people like the state emergency services should be looking at their procedures again and what they need to be doing to respond to an earthquake.

"People who manage schools and hospitals ought to also be making sure they are not vulnerable."

However Mr Love said people should not be alarmed that Friday's seismic activity indicated something more sinister to come.

"We've got no way of predicting them and there hasn't been a particularly large number and nothing that should stand out," Mr Love said.

"There's always the chance of something bigger, but the probability of that really is quite low.

"If there are a lot of these in the next couple of months some people might get upset, but this is close enough to normal, except we don't usually have then down here, we usually see them up in the Flinders."

Mr Love said Friday's seismic activity was about 20km underground.

Police and emergency services were inundated with emergency calls from across the state as people near the epicentre reported the sound of an "explosion".

More than 500 calls were logged within hours of the quake hitting, with shockwaves felt up to 100km away and as far as Kangaroo Island, but by the light of day SES had reported no structural damage.

The AdelaideNow website was flooded with more than 1600 comments from people recounting their experiences.

Sharon Butler, 37, husband Scott, 42, and their three young children - Holly, 9, Thomas, 6, and Bethany, 5 - were asleep in their Wistow home when the quake struck.

"It sounded like a roar of thunder then there was a muffled bang and the house shook," Mrs Butler said. "I Googled it today and realised it was an earthquake; it was pretty exciting."

Mt Barker Natural Food Barn worker Patrick Buckley, 59, said he arrived at work yesterday to find stock on his shelves jumbled up and out of place, but hadn't been surprised by the quake.

"I've known that there was going to be some sort of activity so I've adjusted to it. Nostradamus predicted it," he said.

SA is among the state most susceptible to earthquakes and Adelaide, the Mt Lofty Ranges, the Flinders Ranges, the Eyre Peninsula and Mt Gambier are at most risk.

It is believed that normal tectonic-plate movement and pressure caused the quake.

Mr McCue said the Australian tectonic plate was moving north at 7cm a year, nudging with adjoining Eurasian and Pacific plates and increasing stress on this continent.

Should the sale of junk food in school canteen be banned?

The word ‘junk food’ is mainly used to describe any food that contains low nutritional value which includes take away foods, pre-packaged meals, and sugary snack food (Tran 2005, p.6). Statistics shows that, for the past 30 years, the nutritional value of food taken by the Australian children had fall gradually (Tran 2005, p.6). Now, even worse more than 50% of Australian children prefer to buy junk foods for their lunch (Tran 2005, p.6). It is believe that the habit of eating junk foods will bring bad effects in the children’s’ behaviour (Smith 2005, p.3). They blame a lot of people including the school canteen. Thus, the sale of junk food in school canteen should be banned as junk food is unhealthy, create a bad eating habit and litter problems.

Junk food is said to be unhealthy as it contains low nutritional value which comes from the chemical additives that helps to enhance the flavour and colour (Smith 2005, p.3). These additives can cause behavioural problems especially in children (Smith 2005, p.3). The problem is made worse by the fact that most young people do not get enough physical activity (Tran 2005, p.6). This can lead to an increase in childhood obesity (Smith 2005, p.3). According to The Food Show (2005), Caputo said that, research had shown that by reducing the unhealthy food in the children diets can improve their behaviour. Other than that, by offering foods high in fat and sugar, school canteens are actually contributing to the problem of youth weight gain (Tran 2005, p.6). Therefore, avoiding the children from buying junk foods by banning the sales of it is the best way for the children to stop.

Moreover, junk food creates bad habit in the children’s lifestyle if it is taken continuously. Other than that, consuming junk food in an excess might stop the children from taking healthy meal either at school or home. Based on the Australian Nutrition Journal in 2004, the percentage of children eating fat and sugar more than the recommended intake in 2003 is bigger than the percentage intake for fresh fruit and vegetables in the same year. If this continues to happen, our children might be suffering from a lot of health problems. Thus, it is important for them to understand that they have to make the right choice of eating.

Fast food packaging is the major contributor to litter problems (Smith 2005, p.3). In The Food Show (2005), Green noted that, when junk foods were sold at the canteen the school had a major problem with litter – there were cans, crisp packets, cantons and plastics container everywhere. Furthermore, it increases the cleaning costs and gives bad image of our communities (Smith 2005, p.3). Therefore, banning the sales of junk foods would really help preventing the children from buying them.

In a nut shell, it is important for the children to eat a healthy meal in their daily life. In The Food Show (2005), Green noticed that, there are improvements in the students’ behaviour in class when the sales of junk food are removed from the school canteen. The most important is that the eating habits of the children will change. Other than that, the litter problems too can be resolve. Therefore, the sale of junk food in school canteens should be banned.

The word ‘junk food’ is mainly used to describe any food that contains low nutritional value which includes take away foods, pre-packaged meals, and sugary snack food (Tran 2005 p.6). Statistics shows that, for the past 30 years, the nutritional value of food taken by the Australian children had fall gradually. Now, even worse more than 50% of Australian children prefer to buy junk foods for their lunch. Most parents think that the habit of eating junk foods will bring bad effects in their children behaviour. They blame a lot of people including the school canteen. Thus, the sale of junk food in school canteen should be banned as junk food is unhealthy, create a bad eating habit and litter problems.

Junk food is said to be unhealthy as it contains low nutritional value which comes from the chemical additives that helps to enhance the flavour and colour (Smith 2005). These additives can cause behavioural problems especially in children (Smith 2005). The problem is made worse by the fact that most young people do not get enough physical activity (Tran 2005 p.6). This can lead to obesity among the childhood (Smith 2005). According to The Food Show (2005), Caputo said that, research had shown that by reducing the unhealthy food in the children diets can improve their behaviour. Other than that, by offering foods high in fat and sugar, school canteens are actually contributing to the problem of youth weight gain (Tran 2005 p.6). Therefore, avoiding the children from buying them by banning the sales of junk food is the best way for them to stop.

Moreover, junk food creates bad habit in the children’s lifestyle if it is taken continuously. Other than that, consuming junk food in an excess might stop the children from taking healthy meal either at school or home. Based on the Australian Nutrition Journal on 2004, the percentage of children eating fat and sugar more than the recommended intake has increases. If these continue our children might be suffering from a lot of health problems. Thus, it is important for them to understand that they have to make the right choice of eating.

Fast food packaging is the major contributing to litter problems (Smith 2005). In The Food Show (2005), Green noted that, when junk foods were sold at the canteen the school had a major problem with litter – there were cans, crisp packets, cantons and plastics container everywhere. Furthermore, it increases the cleaning costs and gives bad image of our communities (Smith 2005). It is said that, most of the school canteens rely on the sale of these foods to make a profit in order to pay the salaries of canteen staff (Smith 2005). They knew that junk food could generate greater profits for them. That is the reason why junk foods are sold cheaper than fresh foods (Smith 2005). They only considering their private benefits rather than the negative externalities they give to the school children and environment. Therefore, banning the sales of junk foods would really help preventing the children from buying them.

In a nut shell, it is important that the children eat a healthy meal in their daily life. Some parents believed that without junk food the student’s behaviour will be improved. The most important is that the eating habits of the children will change. Other than that, the litter problems too can be resolve. Therefore, the sale of junk food in school canteens should be banned.

Sorry for the late closure of my birthday episodes....

Date : 28 March 2010 (Sunday)
Venue : Mid Valley Megamall, Kuala Lumpur
Time : 10.30 a.m.

Like what I've told you before, I did my birthday celebration at Mid Valley and invited some of my friends and including the one that I met during my interview, Hafiz.
I arrive early that day as I was so excited to meet my friends from my previous school. I waited them infront of Jaya Jusco entrance. Syikin called me and said that she has arrived but she want to go to the MPH first to buy something. Hafiz was still on the ktm at that time. At first, there were 3 more of my friends who were going to attend my celebration but unfortunately something came up on the last minute so they only wish me through calls, message and FB. I received they're wishes last night when the clock hit 12 times ~_~
That was the busiest moment...haha...
I had to answer a lots of YM and chats from FB...
Then came the calls and messages....~_~
Back to Mid, We ate Pizza Hut that day, the new one, Chunky Loaded, my brother always ask me for that but I didn't have the time to bring them to Pizza Hut during the last break. I'm not sure if I had told you about this before, Hafiz birthday was before me, that was on 27 of March. So I decided to treat him Pizza but he demanded for a SONY mp3 player, the latest one. I explained to him before that I can't afford to pay for it but then I had a second though of buying it for him before I fly to Australia when he took me to SONY's shop in Mid, I do like the mp3 and I think its ok tu buy it for him but not now as I was saving for the night celebration with my INTI's friend....
Syikin bought us a dessert and I shared it with Hafiz...~_~but we didn't manage to finish it including the pizza so I ask the waiter to pack them up.
I know that Hafiz and his friends wanted to go to PWTC that day as that was the last day for the BOOK FAIR so I asked Syikin if she wants to go to. "NO, sorry katy but I got things to do so I can't be too long" huhu...I understand that everyone is so busy lately, so the celebration end up early...huhu...
But I manage to go to Jusco before we end up the day and bought two lovely cardigan...I'm not sure about the spelling...but it sounds right....haha...and a white T-shirt~_~


Date : 28 March
Venue : INTI's dining hall ~_~
Time : 9.00 p.m.

Second celebration!!!

Thanks To All !!!