The lateral radiographic average preoperative talo-first metatarsal and talar declination angles were 11.3 and 27.5, respectively, and were 3.7 and 21.9, respectively, postoperatively.
Then, the reduction to the north magnetic pole (RTP) map was derived from the total magnetic intensity data, using inclination and declination values of 44.3° and 2.45°, respectively (Rabie, 2011).
a χ, low-field magnetic susceptibility; b, c declination and inclination of the ChRM directions, respectively; d VGP Lat.
The meridional wind is: W_{{{text{m}} }} = W_{text{equ}} cos delta pm W_{text{east}} sin delta (1 where W equ and W east are the equatorward and eastward components, respectively, δ is the magnetic declination, and the + and − signs apply in the southern and northern hemisphere.
Post-operatively the talocalcaneal, calcaneal inclination, and talar declination angles were 19 (14–21), 218 25–25), and 8 (4–12) degrees, respectively.
Let V x and V y be the geographically meridional (equatorward positive) and zonal (eastward positive) wind components derived by HWM93, where D and I are the magnetic declination and inclination angles obtained from International Geomagnetic Reference Field (IGRF-11), respectively.
The geomagnetic inclination and declination of the second earthquake epicenter is −17.26° and −1.74°, respectively.
