Rocking here today

[Irish Rover]

I’ve spent the last few years in Uzbekistan where minor earthquakes were a weekly occurrence- got quite blasé about them.. however a big one did flatten Tashkent in the 1960s, so it was always a little nerve wracking!

That's the worry. I was down south in Alanya when the big one hit in the north west close to Istanbul in August 99. The official death toll is put at over 17,000 but it is widely believed to be much higher even double that number. Antalya/Alanya is a major tourist hub and most of the workers there come from other parts of Turkey. It was heartbreaking to see thousands of people gathered in groups around telephones trying to get news on their families with most of the telephone and communication network out of action or grossly overloaded.
I had been in İstanbul only a few days before.

 

[Daydream believer]

Earthquakes come in pairs..the shock and aftershock

That is a bit like buying boat bits with Paypal then
You get the shock of seeing how much it is when you click the checkout button & you realise what you have just done.
Then you get another shock when the credit card bill arrives

 

[johnalison]

That's the worry. I was down south in Alanya when the big one hit in the north west close to Istanbul in August 99. The official death toll is put at over 17,000 but it is widely believed to be much higher even double that number. Antalya/Alanya is a major tourist hub and most of the workers there come from other parts of Turkey. It was heartbreaking to see thousands of people gathered in groups around telephones trying to get news on their families with most of the telephone and communication network out of action or grossly overloaded.
I had been in İstanbul only a few days before.

I read somewhere that Istanbul is due for a big one some time not too far away. It looks as if the earthquake centres have been moving in that direction over the last few centuries. However, given the uncertainly in the field, it could still be a long time before it happens.

There is an amazing photo taken from a ship that was approaching Santiago (I think) in the late 1800s, during which the ship was unaffected but watched the town crumbling to dust ahead of them but I can't at the moment find it.

 

[Daydream believer]

the ship was unaffected but watched the town crumbling to dust ahead of them but I can't at the moment find it.

Well you would not if it crumbled to dust

 

[Irish Rover]

We had around 50 earthquakes here yesterday with the epicentres within 6/7 Km of our house. Although none of them were more than 4 they were mostly shallow so the combination of the proximity and shallow depth resulted in the house shaking around half a dozen times. We're used to it but it's always a bit worrying that the next one will be the big one. The activity has moved north this morning and Lesvos Island is experiencing another shower of quakes some over 5.

 

[fredrussell]

Earthquakes come in pairs..the shock and aftershock

Same as boat repair bills.

 

[Wansworth]

Galicia has a few now and then hence new houses built using anti falling down systems,old houses built of drystone occasionally collapse.

 

[Spirit (of Glenans)]

Boat shaking - you could describe it as vibration I suppose - I assume it's the seabed under the anchor shaking and being transmitted to the boat via the chain. No swell where I was that I noticed. It was pretty calm but there are always occasional waves from bigger boats passing at speed in the bay particularly ferries and the coastguard.
There was a 6.9 here in the bay on 30 Oct 2020. We were anchored in the same place for that and we knew it was a biggy. We upped anchor immediately and headed for the marina arriving just the same time as the tail-end of the tsunami which caused huge damage up the coast in Seferihisar and Teos marina.

I have read previously that tsunamis which have caused devastation on coasts have been almost un-noticeable at sea, with some of the most destructive of them having a wave height of less than a metre. If I were in your position I would have headed for deeper water rather than shallower.

 

[mjcoon]

We had around 50 earthquakes here yesterday with the epicentres within 6/7 Km of our house. Although none of them were more than 4 they were mostly shallow so the combination of the proximity and shallow depth resulted in the house shaking around half a dozen times. We're used to it but it's always a bit worrying that the next one will be the big one. The activity has moved north this morning and Lesvos Island is experiencing another shower of quakes some over 5.

Maybe the intermediate ones are relieving the accumulated strain/stress and postponing The Big One...

 

[Irish Rover]

Maybe the intermediate ones are relieving the accumulated strain/stress and postponing The Big One...

That's certainly what we're all hoping ?

 

[Irish Rover]

Just sitting down to watch the intercontinental Derby between Fenerbahçe and Galatasaray and the whole bloody house shook.

 

[Irish Rover]

Just sitting down to watch the intercontinental Derby between Fenerbahçe and Galatasaray and the whole bloody house shook.

Only 3.5 but almost directly under us in the bay. Galatasaray 1 up at half time ?????

 

[Spirit (of Glenans)]

Just sitting down to watch the intercontinental Derby between Fenerbahçe and Galatasaray and the whole bloody house shook.

Why do they use the word "derby" to denote a match between teams from the same town? Does it mean that the Derby is a race between horses who are neigh(?) bours?

 

[dgadee]

My Dehler is afloat in Mytilini, Lesvos. Seems 4.9 on Saturday and they are saying that may not be the main event. I presume there is unlikely to be damage at a pontoon.

I wondered about building the tunnel at Istanbul. Isn't it supposed to be directly over a fault line?

 

[mjcoon]

My Dehler is afloat in Mytilini, Lesvos. Seems 4.9 on Saturday and they are saying that may not be the main event. I presume there is unlikely to be damage at a pontoon.

I wondered about building the tunnel at Istanbul. Isn't it supposed to be directly over a fault line?

I think there was a TV programme about the engineering challenges in building that tunnel for exactly that reason. Not to mention archaeology that they were uncovering at the same time...

Similarly, of course, building the Rion/Antirion bridge, though I suppose that would be a different fault line.

 

[Irish Rover]

My Dehler is afloat in Mytilini, Lesvos. Seems 4.9 on Saturday and they are saying that may not be the main event. I presume there is unlikely to be damage at a pontoon.

I wondered about building the tunnel at Istanbul. Isn't it supposed to be directly over a fault line?

I guess a tsunami is always the worry. A 6.9 here in Kuşadası bay in October 2020 caused a lot of damage up the coast in Teos Marina.
Which tunnel do you mean?

 

[dgadee]

I guess a tsunami is always the worry. A 6.9 here in Kuşadası bay in October 2020 caused a lot of damage up the coast in Teos Marina.
Which tunnel do you mean?

This one: Eurasia Tunnel - Wikipedia

I was last in Istanbul around 2014 and it hadn't been opened. Not sure I would want to pass through it even though, "[t]he design earthquake magnitude was specified as moment magnitude of 7.25 and design of functional and safety evaluation earthquakes have a return period of 500 and 2,500 years, respectively."

 

[Irish Rover]

This one: Eurasia Tunnel - Wikipedia

I was last in Istanbul around 2014 and it hadn't been opened. Not sure I would want to pass through it even though, "[t]he design earthquake magnitude was specified as moment magnitude of 7.25 and design of functional and safety evaluation earthquakes have a return period of 500 and 2,500 years, respectively."

I've been on the metro through the Marmaray tunnel (opened 2013) a good few times but not that one. I don't think it would bother me though. Plenty of other underwater tunnels in high risk areas such as the San Francisco Bay tunnel.

 

[Irish Rover]

@dgadee Have a look at this. Lesvos [Midilli Asası] getting hammered again today
Son Depremler

 

[dgadee]

Yes, maybe something big is building. Yacht insurance is a great comfort.