Heavy research has been focused on the seismo-ionospheric influence since the Wenchuan \(M_{\rm S}\) 8.0 earthquake took place on 12 May 2008, in China and anomalous information has been increasingly explored at least for ionospheric parameters monitored by the ground-based ionosonde, DEMETER satellite, ground-based GPS receivers, six microsatellites of FORMOSAT3/COSMIC (F3/C), and the CHAMP satellite. [PERSON] et al. [16] have made a summary of these measurements and reported that ionospheric variations with amplitudes of 20-123% appeared primarily one month, mainly two weeks, and collectively within one week prior to the main event. The GPS TEC anomalies happened within a range of 20\({}^{\circ}\) in the southeast around the epicenter area, as well as in its magnetically conjugated area [17] in space, and their space sizes could extend up to 2850 km in longitude and 1650 km in latitude [18]. [PERSON] et al. [19] have analyzed irregularities in the DEMETER ion density and electron density and GPS TEC before four strong earthquakes (EQs) of the 2009 Samoa islands \(M_{\rm W}\) 8.1 EQ, the 2008 Sichuan \(M_{\rm W}\) 7.9 EQ, the 2009 L'Aquila \(M_{\rm W}\) 6.3 EQ, and the 2006 Hormozgan \(M_{\rm W}\) 6.0 EQ during geomagneticly quiet conditions and reported that the positive and negative anomalies appeared 1 to 5 days prior to these events. Furthermore, more details of the variations have also been revealed: 67% for DEMETER parameters and GPS TEC before the Samoa \(M_{\rm W}\) 8.1 EQ: \(-\)52% and \(-\)37% for ion density and electron density, and \(-\)24% for TEC before the Sichuan \(M_{\rm W}\) 7.9: 47% and 15% for electron density and ion density, and 28% for TEC before the L'Aquila \(M_{\rm W}\) 6.3 EQ; and 36% for electron density and 21.5% for TEC before the Hormozgan \(M_{\rm W}\) 6.0 EQ. These varied amplitudes tend to illustrate the fact that changed ionospheric amplitudes increase as the magnitudes of the considered EQs increase. A large number of investigations of the seismo-ionospheric influence seem to reach a common sense that ionospheric information easily happens two weeks prior to the seismic events and it can be considered as a short-term precursor, while the specified location where these precursory signals tend to appear has not been confirmed yet possibly due to the low spatial resolution and dependence of the local time of satellite observations. An automatic detection method to detect DEMETER perturbations in the main seismic belt areas was initially developed by [PERSON] and [PERSON] [20] and then was improved to search for DEMETER and CSES perturbations globally with a prolonged space size [21; 22; 23; 24; 25; 26; 27]. It was revealed that ionospheric perturbations with a large magnitude, like \(\mid\!A\!\mid\!>\!100\)%, and a large space size, like \(t\!>\!200\) s, can well establish large-scale ionosphere structures, such as the equatorial ionization anomaly (EIA), the Weddle sea anomaly (WSA), the South Atlantic Magnetic Anomaly (SAMA), and so on [25; 26; 27]. To correlate moderate ionospheric perturbations to strong low-mid latitude earthquakes with a specified time and space window, like a 15 day delay and 1500 km from epicenters, the statistical results show that, in time, the ionospheric effect mainly appears within 5 days prior to EQs for both electron density and ion density and shifts 500-700 km from the mid-low-latitude epicentersinstead of right above them, which highly complies theoretically with the physical seismo-ionospheric model based on a zonal electric field propagating along magnetic lines [27]. However, we have to mention the fact that satellites, like DEMETER and CSES, have their own revisiting periods and their observations heavily depend on the local time. Meanwhile, their orbit heights (660 km for DEMETER and 500 km for CSES) are far from the altitude of 200-400 km where electrons concentrate and the apparent seismic ionospheric influence easily occurs [28]. These properties possibly prevent a comprehensively established seismo-ionospheric feature.