Analysis of VTEC and Scintillation Parameters during Very Strong Geomagnetic Storm Events at Pontianak

Abstract:

Geomagnetic storms, triggered by enhanced solar activity, significantly impact the Earth's ionosphere, affecting space-based technologies. These storms occur when the solar wind carries charged particles into the Earth's atmosphere, disturbing the geomagnetic field. This study analyzes ionospheric responses to strong geomagnetic storm events at Pontianak, focusing on Vertical Total Electron Content (VTEC) and scintillation parameters indicated by the S4 Index. Data were obtained from a Septentrio instrument at the Pontianak station for three events (April 24, 2023, May 11, and August 12, 2024). VTEC measurements and the S4 Index were used to identify ionospheric irregularities. VTEC increased during the storm's expansion phase in April 2023 and May 2024, but differed in August 2024, possibly due to fluctuations in solar wind speed and the interplanetary magnetic field. Strong scintillation occurred approximately one day after the Dst minimum in April 2023 and August 2024, but did not occur in May 2024. The May 2024 event showed a delayed increase in the S4 Index, potentially due to variations in the interplanetary electric field and fluctuating auroral and mid-latitude magnetic activity. This research enhances our understanding of ionospheric behavior during intense geomagnetic storms, highlighting the complex interplay between solar-terrestrial interactions and ionospheric irregularities.

• Periodical: Engineering Headway (Volume 27)
• Pages: 471-480
• DOI: https://doi.org/10.4028/p-0WUC6z
• Online since: October 2025
• Authors: Angga Yolanda Putra, Afif Rakhman*, Prayitno Abadi, Theodosius Marwan Irnaka, La Ode Muhammad Musafar Kilowasid, Erlansyah Erlansyah
• Keywords: Geomagnetic Storm, Ionospheric Irregularities, S4 Index, Scintillation, VTEC

References

[1] Basavaiah, Geomagnetism: Solid earth and upper atmosphere perspectives, Indian Institute of Geomagnetism Navi Mumbai, India, 2011.

[2] A.J. Zmuda, J.H. Martin, F.T. Heuring, Transverse magnetic disturbances at 1100 km in the auroral region, Journal of Geophysical Research. 71 (1966) 5033-5045.

DOI: 10.1029/jz071i021p05033

[3] R.Shahzad, M. Shah, M.A. Tariq, A. Calabia, A. M-Morales, P. Jamjareegulgarn, L. Liu, Ionospheric–thermospheric responses to geomagnetic storms from multi-instrument space weather data, Remote Sensing. 15 (2023) 2687.

DOI: 10.3390/rs15102687

[4] S. Taguchi, K. Hosokawa, Y. Ogawa, Investigating the particle precipitation of a moving cusp aurora using simultaneous observations from the ground and space, Progress in Earth and Planetary Science. 2 (2015).

DOI: 10.1186/s40645-015-0044-7

[5] K.Ya. Kondrate'ev (Ed.), Radiation characteristics of the atmosphere and the earth's surface, Amerind Publishing Co. Pvt. Ltd., New Delhi, 1973.

[6] N. Jacowski, Y. Béniguel, G.D. Franceschi, M.H. Pajares, K.S. Jacobsen, I. Stanislawska, L. Tomasik, R. Wamant, G. Wautelet, Monitoring, tracking and forecasting ionospheric perturbations using GNSS techniques, Journal of Space Weather and Space Climate. 2 (2012) A22.

DOI: 10.1051/swsc/2012022

[7] Asnawi, Statistical analysis of ionospheric scintillation occurrences in the low-latitude region of Indonesia based on observational data from the Kotatabang station, Journal of Aerospace Science and Technology. 8 (2015).

[8] Y.J. Morton, Z. Yang, B. Breitsch, H. Bourne, C. Rino, Ionospheric effects, monitoring, and mitigation techniques, Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications. 1 (2020).

DOI: 10.1002/9781119458449.ch31

[9] L. Spogli, C. Cesaroni, D. Di Mauro, M. Pezzopane, L. Alfonsi, E. Musicò, G. Povero, M. Pini, F. Dovis, R. Romero, N. Linty, P. Abadi, F. Nuraeni, A. Husin, M.L. Huy, T.T. Lan, T.V. La, V.G. Pillat, N. Floury, Formation of ionospheric irregularities over Southeast Asia during the 2015 st. patrick's day storm, Journal of Geophysical Research: Space Physics. 121 (2016) 12,211-12,233.

DOI: 10.1002/2016ja023222

[10] A.Y. Putra, P. Abadi, L.O.M.M. Kilowasid, N. Syafitri, F. Nuraeni, V. Wellyanita, K. Wisnu, C. Purnomo, Suwarno, A. Rakhman, Investigation of geomagnetic storm effects on ionosphere over Pontianak: A study case, In Proceedings of the International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, Indonesia. 305 (2023) 567-575.

DOI: 10.1007/978-981-97-0740-9_51

[11] P. Abadi, U.A. Ahmad, Y. Otsuka, P. Jamjareegulgarn, D.R. Martiningrum, A. Faturahman, S. Perwitasari, R.E. Saputra, R.R. Septiawan, Modeling post-sunset equatorial spread-f occurrence as a function of evening upward plasma drift using logistic regression, deduced from ionosondes in Southeast Asia, Remote Sensing. 14 (2022) 1896.

DOI: 10.3390/rs14081896

[12] C.A. Loewe, G.W. Prolss, Classification and mean behavior of magnetic storms, Journal of Geophysical Research. 102 (1997) 14209-14213.

DOI: 10.1029/96ja04020

[13] C.S. Carrano, K.M. Groves, C.L. Rino, On the relationship between the rate of change of total electron content index (ROTI), irregularity strength (CkL), and the scintillation index (S4), Journal of Geophysical Research: Space Physics. 124 (2019) 2099–2112.

DOI: 10.1029/2018ja026353

[14] S. Dubey, R. Wahi, A.K. Gwal. Ionospheric effects on GPS positioning, Advances in Space Research. 38 (2006) 2478-2484.

DOI: 10.1016/j.asr.2005.07.030

[15] N. Butcher, Daily ionospheric forecasting service (DIFS) III, Annales Geophysicae. 23 (2005) 3591–3598.

DOI: 10.5194/angeo-23-3591-2005

[16] C.S. Carmo, C.M. Denardini, C.A.O.B. Figueiredo, L.C.A. Resende, G.A.S. Picanço, P.F. Barbosa Neto, P.A.B. Nogueira, J. Moro, S.S. Chen, Evaluation of different methods for calculating the ROTI index over the brazilian sector, Journal of Advancing Earth and Space Science. 56 (2021) e2020RS007140.

DOI: 10.1029/2020rs007140

[17] A. Tahir, F. Wu, M. Shah, C. Amory-Mazaudier, P. Jamjareegulgarn, T.G.W. Verhulst, M.A. Ameen, Multi-instrument observation of the ionospheric irregularities and disturbances during the 23–24 march 2023 geomagnetic storm, Remote Sensing. 16 (2024) 1594.

DOI: 10.3390/rs16091594

[18] M. Chakraborty, S. Kumar, B. Kumar De, A. Guha, Effects of geomagnetic storm on low latitude ionospheric total electron content: A case study from Indian sector, Journal of Earth System Science. 124 (2015) 1115–1126.

DOI: 10.1007/s12040-015-0588-3

[19] Y. Yamazaki, A. Maute, Sq and EEJ—A review on the daily variation of the geomagnetic field caused by ionospheric dynamo currents, Space Science Reviews. 206 (2017) 299–405.

DOI: 10.1007/s11214-016-0282-z

[20] G.K. Parks, Physics of space llasmas: An introduction, Westview Press; 2nd edition, 2003.