Abstract
Magnetic gradiometer survey has been conducted on the yard of the archaeological site of Masjid Tuha Indrapuri, Aceh Besar Regency, Aceh Province. The site is one of the oldest mosques erected during the Aceh Sultanate period. Magnetic method was applied for mapping archaeological structures buried beneath the surface. Total magnetic field data were measured using Proton Precession Magnetometer with grid spacing of 2 meters between stations covering the entire area of the site. Diurnal and international geomagnetic reference field data were corrected to the measured data in order to calculate total magnetic field anomalies that were influenced by the buried magnetic objects. The total magnetic field anomalies distribution shows two elongated structures with U-shaped patterns surrounding the mosque. The patterns are also revealed in reduction to the pole and derivative vertical filters of the total field anomaly data. The anomaly patterns are considered a response from the rest of the buried fences that were built around the mosque in the past.
Highlights
Aceh is an area that has inherited many cultural heritage sites from the past
The magnetic method, sometimes referred to as the geomagnetic method, is a technique most often used to investigate archaeological objects or sites of cultural heritage buried under the surface
The international geomagnetic field reference (IGRF) corrections were performed for eliminating the data from effect of the Earth's main magnetic field
Summary
Aceh is an area that has inherited many cultural heritage sites from the past. Some of them are still visible on the surface, but many of them have been damaged or buried beneath the surface. These heritage sites need to be saved and preserved for education and historical monuments. The ancient mosque of Masjid Tuha Indrapuri (Figure 1) located in Indrapuri District, Aceh Besar District is one of the famous heritages. The building stands on an area of 33,875 M2 and is located at an altitude of 22 meters above sea level from the tributary of the Krueng Aceh river [1], i.e. about 27 km from Banda Aceh to the east (Figure 2).
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