Ma szolgáltatáskiesés van.

Ma means today.

It is placed first because Hungarian often puts the time expression near the beginning of the sentence, especially when it sets the scene for the whole statement.

So:

• Ma szolgáltatáskiesés van. = Today, there is a service outage.

You could also hear other word orders, but starting with ma is very natural when today is the important frame for the sentence.

Szolgáltatáskiesés is a compound noun:

• szolgáltatás = service
• kiesés = falling out, interruption, outage, loss

Together, szolgáltatáskiesés means something like:

• service outage
• service disruption
• service interruption

Hungarian often combines words into one long compound where English would use two separate words.

Because Hungarian commonly writes compound nouns as a single word.

So English:

• service outage

becomes Hungarian:

• szolgáltatáskiesés

This is very normal in Hungarian. Long compounds are common, especially in formal, technical, or administrative language.

Van is the 3rd person singular form of lenni = to be.

In this sentence, it means there is / exists:

• szolgáltatáskiesés van = there is a service outage

This is an existence sentence, not an equals sentence.

Compare:

• Ő tanár. = He/She is a teacher.
  No van is used here in the present tense.
• Hiba van. = There is a problem.
• Szolgáltatáskiesés van. = There is a service outage.

So van appears because the sentence is saying that something exists/is happening.

Hungarian often omits the article in short notices, announcements, and matter-of-fact statements like this.

So:

• Ma szolgáltatáskiesés van.

sounds like a concise service notice: Today there is a service outage.

You could also see:

• Ma szolgáltatáskiesés van. = more neutral, announcement-like
• Ma egy szolgáltatáskiesés van. = There is one service outage today or a more specifically counted outage

Using egy here is usually less natural unless you really want to emphasize one.

Yes, that is the closest natural English structure.

Hungarian does not need a dummy subject like there. English says:

• There is a service outage today.

Hungarian simply says:

• Ma szolgáltatáskiesés van.

So the Hungarian structure is closer to:

• Today service-outage is

but the natural English translation is:

• There is a service outage today.

Yes, different word orders are possible, but they shift the emphasis a little.

• Ma szolgáltatáskiesés van.
  Neutral and very natural. Today is the frame.

• Szolgáltatáskiesés van ma.
  Also possible. The sentence starts by highlighting the outage.

• Ma van szolgáltatáskiesés.
  Possible, but less neutral in everyday use. It can sound more contrastive, as if answering When is there an outage? — Today.

Hungarian word order is flexible, but it is not random: it changes what is highlighted.

Because ma is already an adverb meaning today.

It is not a noun here, so it does not need a case ending like -ban/-ben or -kor.

Compare:

• ma = today
• holnap = tomorrow
• tegnap = yesterday

These common time words often appear without any extra ending.

You negate it by putting nincs instead of van:

• Ma nincs szolgáltatáskiesés. = There is no service outage today.

Here:

• van = is / there is
• nincs = is not / there is no

This is the normal existential negation in Hungarian.

You would say:

• Ma szolgáltatáskiesések vannak.

Breakdown:

• szolgáltatáskiesés = singular
• szolgáltatáskiesések = plural
• van = singular there is
• vannak = plural there are

So singular and plural must match:

• Ma szolgáltatáskiesés van.
• Ma szolgáltatáskiesések vannak.

It sounds fairly neutral to formal, and especially natural in:

• service notices
• company announcements
• technical status updates
• administrative messages

In everyday casual speech, someone might also say something like:

• Ma nincs szolgáltatás. = There’s no service today.
• Ma akadozik a szolgáltatás. = The service is unstable today.

But Ma szolgáltatáskiesés van is very natural in official or technical communication.

A rough pronunciation guide is:

• szol-gaal-taa-taash-kee-eh-sh

A few useful points:

• sz sounds like English s
• s sounds like English sh
• á is a long a
• é is a long ay/eh
• stress in Hungarian normally falls on the first syllable of the word

So the main stress is on:

• SZOLgáltatáskiesés

Normally, no.

In present-tense Hungarian, van is often omitted in sentences like:

• Ő beteg. = He/She is sick.

But in existence sentences, van is usually required:

• Hiba van.
• Probléma van.
• Szolgáltatáskiesés van.

So in this sentence, leaving out van would sound incomplete or wrong.