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Satellite data reveals electromagnetic anomalies up to 19 days before 2023 Türkiye earthquake

Satellite data reveals electromagnetic anomalies up to 19 days before 2023 Türkiye earthquake
Satellite data reveals electromagnetic anomalies up to 19 days before 2023 Türkiye earthquake

 


Intensity map and geographic location of the 2023 Türkiye earthquake. The black star indicates the epicenter (https://earthquake.usgs.gov/earthquakes). Credit: Journal of Applied Geodesy (2024). DOI: 10.1515/jag-2024-0024

A recent study in the Journal of Applied Geodesy suggests that earthquakes may reveal their impending presence much earlier than previously thought through a variety of anomalies in the Earth, atmosphere and ionosphere that can be detected using satellites.

Developing earthquake early warning systems can be very helpful in preventing death and destruction. One such proposed technology involves using satellites to monitor a variety of physical and chemical factors within the Earth's atmosphere and the layer of charged particles above it, called the ionosphere.

Such anomalies are known as earthquake precursors, and although researchers are aware of them, it has been difficult to definitively identify the pattern of so-called red flags that could indicate an impending quake. This is due to the complexity of previous interactions and their variation according to earthquakes and geographical regions. However, with each earthquake that researchers analyze using increasingly sophisticated satellite technology, these patterns slowly emerge.

Professor Mehdi Akhundzadeh from the University of Tehran evaluated a variety of satellite data from the period before and after the two earthquakes that occurred on February 6, 2023 near the border between Turkey and Syria. This included data from China's CSES-01 electromagnetic seismic satellite, and the Swarm satellite mission consisting of three satellites from the European Space Agency.

Surprisingly, he observed land surface temperature anomalies from the earthquake zone as early as 12-19 days before the earthquakes, and anomalies in atmospheric parameters between 5-10 days before the earthquakes. These included measurements of water vapor and methane, ozone and carbon monoxide levels.

When Professor Akhundzadeh investigated anomalies in the ionosphere, including measurements of parameters such as electron density and electron temperature, he found strikingly obvious anomalies one to five days before earthquakes occurred.

The times at which the anomalies became evident in the Earth, atmosphere and ionosphere respectively indicate that these signals originated at Earth and eventually became evident at higher levels in the atmosphere and eventually the ionosphere.

Studying these phenomena could pave the way for earthquake early warning systems, but researchers will need to evaluate other earthquakes in the future to fully understand these patterns.

“Using CSES-01 satellite data, ionospheric anomalies before the earthquakes that struck Turkey on February 6, 2023 were detected for the first time,” Professor Akhundzadeh said. “By studying anomalies associated with multiple earthquake precursors, the uncertainty in detecting true anomalies is reduced, and this can be effective in creating earthquake warning systems with few false warnings.”

More information: Mehdi Akhundzadeh, Analyzes of data from China's first electromagnetic seismic satellite (CSES-01) with other seismic precursors associated with the Turkey earthquakes (February 6, 2023), Journal of Applied Geodesy (2024). DOI: 10.1515/jag-2024-0024

Citation: Satellite data reveal electromagnetic anomalies up to 19 days before 2023 Turkey earthquake (2024, June 12) Retrieved June 12, 2024 from https://phys.org/news/2024-06-satellite-reveal-electromagnetic- anomalies-days. programming language

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