held on October 30, 2020 7.0 magnitude(According to the American Geological Survey) Even two years have passed since the earthquake, their trauma is still felt. During the Buca earthquake, which gave him a strong feeling, many people felt that this earthquake could also wreak havoc.

The inhabitants of Buca, at the time of the earthquake, a sound close to thunder they heard. As the noise continued, a very strong vibration started and during the shaking for about 15 seconds, a scream was heard. People on the street were crying after the earthquake, many said it was close to the 2020 earthquake. Even Pets They were also afraid and could not get out of hiding for a long time.

So what was it that caused this difference in violence?

From the ITU Department of Geology, Dr. Omer KamacicWe asked this question to He also has 650,000 followers. On the edge of science Instagram He also manages the page. His information is as follows:

There are two concepts that are often confused when presenting earthquake news: “greatness” and “violence”. The magnitude is the result obtained by instrumentally measuring the seismic waves produced by the earthquake.

The data obtained by the seismometer (graphic output, seismograph) was scaled to the scale proposed by the American seismologist Charles Francis Richter in 1935. (on Richter scale) calculated and presented as a size.

If violence depends on where you meet the seismic waves It is a dynamic concept. The intensity is equal to or greater in magnitude, depending on the distance from the focal point, the floor on which the building stands and the quality of the building. For example, it is possible to feel an earthquake with a magnitude of M5.0 close to the focal point, with poor soil and structure, and a magnitude of 6.

However, earthquakes that can cause destruction are earthquakes of M6 and above, where surface fractures can occur. The intensity of such great earthquakes, It is much bigger than the earthquake itself and can increase the destruction.

The expected “Great Istanbul Earthquake” will be felt in some places with a magnitude of 9.0.

In the scenarios prepared for the expected Istanbul earthquake, the magnitude is expected to be no less than M7.0. (Predictions M7 to M7.4). We know that the earthquake will come from the sea, although the question is what benefit will be realized in the Sea of ​​Marmara.

So for the violence Districts with coasts to the Sea of ​​Marmara demonstrably carries a greater risk. It is thought to be felt in districts such as Avcılar, Bakırköy, Fatih, Küçükçekmece, Büyükçekmece and Silivri with an intensity of more than 8.

If we add the soil and build quality in addition to the proximity of the focus, especially the old structures built on the backfill soils could be damaged in an earthquake on M7. It can be said that the intensity can be up to 9.0. Therefore, the magnitude is determined immediately after the earthquake and the intensity is determined by the destruction after the earthquake.

Coming from the sea or the land, the intensity does not change much.

Because the seas are in Turkey It is the inland sea and the floors are similar to the land. If we had a coast to the ocean and the earthquakes were in the ocean, the difference between earthquakes on land or on water would be significantly greater. Distance, ground and build quality, It is much more effective than whether the earthquake occurs in the inland sea or on land.

Izmir’s earthquake risk is not over yet. A larger earthquake could hit the city, which sits on a fault line that hasn’t broken for 352 years.

We reminded you of this error on the 1st anniversary of the 2020 earthquake. Along the south coast of Izmir Bay the great fault line, which crosses the land at Bornova, Göztepe, and has not yet broken, enters the sea just west of Göztepe. In case of breakage 7.0 magnitude It can cause an earthquake and damage the structures in the plain of the city. 70% is destroyed.

Both citizens and authorities should take precautions by not forgetting earthquakes.