Það var smá truflun á netinu í morgun.

Here það does not mean a concrete it referring to something specific. It is a dummy subject, much like English there in There was a problem.

So:

• Það var smá truflun ... = There was a slight disruption ...

This use of það is very common in Icelandic when introducing the existence of something or describing a situation.

Var is the past tense singular of vera (to be).

The sentence is talking about a single disruption:

• smá truflun = a slight disruption

So singular var is natural here.

Compare:

• Það var smá truflun á netinu. = There was a slight disruption on the internet.
• Það voru truflanir á netinu. = There were disruptions on the internet.

So if the noun phrase were plural, you would normally get voru instead.

Smá means small, slight, or a bit of depending on context.

In this sentence, it means something like:

• a slight disruption
• a minor interruption
• a bit of interference

A useful thing to know is that smá is very often used in everyday Icelandic in a fairly flexible, colloquial way. It does not behave like a fully regular adjective in the way many learners first expect. You can think of it here almost as a fixed modifier meaning slight/minor.

Truflun is singular: disruption / interference / interruption.

So:

• smá truflun = a slight disruption

If you said truflanir, that would be plural:

• Það voru truflanir á netinu. = There were disruptions / there was interference on the internet.

The singular sounds natural when talking about one general incident or one period of disturbance. The plural is also common if you want to emphasize repeated or multiple interruptions.

Truflun is a feminine noun.

Its basic singular forms are:

• truflun — nominative
• truflun — accusative
• truflun — dative
• truflunar — genitive

In this sentence, the form is truflun, which is the expected basic form.

For many learners, the most important thing is simply to remember the noun together with its gender:

• truflun (f.)

That helps later when you learn adjective agreement and articles.

Á netinu means on the internet / on the network.

Breakdown:

• á = on
• netinu = the net / the network in the dative singular

With location, á often takes the dative in Icelandic. Since this sentence describes where the disruption was happening, the dative is used:

• á netinu = on the internet

So this is not just vocabulary—it is also a preposition + case pattern you should learn as a chunk:

• á netinu

Netinu is the definite form: the net / the network.

So:

• net = net / network
• netið = the net (nominative/accusative)
• netinu = the net (dative)

Because á here requires the dative for location, you get:

• á netinu

In English we often say simply on the internet, and Icelandic similarly tends to use the definite form here.

Often, yes—but not always.

Literally, net means net or network, and in modern everyday use á netinu very often means:

• on the internet
• online

Depending on context, it can also refer more generally to a network connection. So in a sentence about technical problems, it may suggest:

• the internet
• the network
• the connection online

That is why translations can vary a little depending on context.

Í morgun is a very common fixed time expression meaning:

• this morning
• earlier this morning

It is idiomatic and extremely common in Icelandic.

So:

• í morgun = this morning
• í gær = yesterday
• í kvöld = tonight / this evening

You should learn í morgun as a whole expression rather than trying to build it word by word from scratch.

Yes, the word order can change, but the original sentence is very natural.

Basic version:

• Það var smá truflun á netinu í morgun.

You could also say:

• Í morgun var smá truflun á netinu.

That puts more emphasis on this morning.

Icelandic has a verb-second tendency in main clauses, so if you move a different element to the front, the finite verb usually still comes early:

• Í morgun var ...

So the words can move around more than in English, but not randomly.

Very often, yes.

The pattern:

• Það var ...

frequently corresponds to English:

• There was ...

Examples:

• Það var veisla í gær. = There was a party yesterday.
• Það var vandamál. = There was a problem.
• Það var smá truflun á netinu í morgun. = There was a slight disruption on the internet this morning.

But sometimes það var can also literally mean it was, depending on context. So you should decide based on the whole sentence, not just the two words by themselves.

It sounds quite natural and everyday.

A few things contribute to that:

• smá is very common in spoken and informal written Icelandic
• á netinu is a normal modern expression
• í morgun is a standard everyday time phrase

So this is the kind of sentence you could easily hear in conversation, customer service, news updates, or casual written messages.

A few natural alternatives are:

• Það var truflun á netinu í morgun.
  = There was a disruption on the internet this morning.

• Það urðu truflanir á netinu í morgun.
  = There were disruptions on the internet this morning.

• Netið var niðri í morgun.
  = The internet was down this morning.

These are not identical in nuance:

• smá truflun suggests something minor
• truflanir can sound a bit broader or more technical
• netið var niðri means the network/internet was down, which is often stronger than just there was a slight disruption