Artçı deprem yeni bir sarsıntıya neden oldu.

Because Turkish often expresses ideas with a short noun phrase rather than a single word.

• artçı = following, secondary, subsequent
• deprem = earthquake

So artçı deprem literally means a secondary/follow-up earthquake, which is exactly what an aftershock is.

In everyday Turkish, artçı can also be used on its own when the context is clear.

Turkish does not have a separate word for the.

A noun can be definite or indefinite depending on context. So Artçı deprem can mean:

• the aftershock
• an aftershock

The exact interpretation depends on the situation and on the translation chosen in English.

Here bir works like a/an in English.

So:

• yeni sarsıntı = new tremor / new shaking
• yeni bir sarsıntı = a new tremor

Using bir makes the noun phrase sound more like a single, specific instance of a new tremor, which is very natural here.

Because the expression neden olmak requires the thing affected to be in the dative case.

So:

• sarsıntı = tremor
• sarsıntı-ya = to a tremor / into a tremor / causing a tremor

The suffix here is the dative -(y)A.

Why -ya specifically?

• the noun ends in a vowel: sarsıntı
• Turkish inserts a buffer y
• vowel harmony gives a, not e

So: sarsıntı + ya = sarsıntıya

Because this is not a direct object with the accusative case.

The verb phrase is bir şeye neden olmak = to cause something.

That means Turkish treats the affected thing as a dative complement, not as a direct object.

So:

• sarsıntıya neden oldu = caused a tremor
• not sarsıntıyı neden oldu

This is something you mostly just learn with the expression neden olmak.

Literally, it is something like became a cause.

• neden = cause, reason
• oldu = became / was / happened, from olmak

But together, neden olmak is a very common expression meaning:

• to cause
• to lead to
• to result in

So in this sentence, neden oldu is best understood as caused.

Turkish often uses noun + verb combinations where English prefers a single verb.

Here the common pattern is:

• X, Y’ye neden oldu = X caused Y

This is extremely normal Turkish. You can think of it as a set expression.

Other Turkish ways to express a similar idea include:

• sebep oldu = caused
• yol açtı = led to / gave rise to

But neden oldu is perfectly standard.

Oldu is the simple past (also called the definite past in Turkish grammar).

It shows that the speaker presents the event as a completed fact.

So:

• oluyor = is becoming / is causing
• oldu = became / caused
• olmuş = apparently became / seems to have become / has become

In this sentence, oldu tells you the causing event is completed.

Because the normal neutral word order in Turkish is verb-final.

This sentence is structured like:

• Artçı deprem = subject
• yeni bir sarsıntıya = complement
• neden oldu = predicate/verb phrase

So the full order is very natural for Turkish.

English usually prefers:

• The aftershock caused a new tremor.

Turkish prefers:

• Aftershock new a tremor-to caused.

That looks strange in English word-for-word, but it is normal Turkish syntax.

They are related, but not identical.

• deprem = earthquake
• sarsıntı = shaking, tremor, jolt

So artçı deprem is specifically an aftershock, while yeni bir sarsıntı is a new tremor/shaking event.

In some contexts, English might translate both with earthquake-related words, but in Turkish the writer is using two slightly different terms.

Yes, in this sentence artçı is functioning like an adjective modifying deprem.

So:

• deprem = earthquake
• artçı deprem = aftershock

But artçı can also act more like a noun in context, for example when people talk about aftershocks in general.

Yes, Turkish word order is flexible, but the original version is the most neutral.

For example, you might also hear:

• Yeni bir sarsıntıya artçı deprem neden oldu.

This still means the same thing, but the emphasis changes. Putting yeni bir sarsıntıya earlier can make that part stand out more.

The original sentence is the most straightforward, textbook-style order.

In context, it can often be understood as another tremor.

Literally:

• yeni = new
• bir = a
• sarsıntı = tremor

So the phrase literally says a new tremor, but English may naturally render that as another tremor depending on context.

That is a translation choice, not a grammar difference.