In Northeast Algeria, a sequence of 143 small earthquakes (M_d ≤ 4.7) occurred near the Mcid Aïcha-Debbagh (MAD) Fault between 4 and 16 March, 2017. During this sequence, 74% of the seismic activity occurred in the first two days. Although the earthquakes were not large, they yielded important new information and have improved our understanding of seismic activity in three distinct regions along the fault. In the Sidi Dris region (western MAD Fault), 106 events (1 ≤ M_d ≤ 3.2) were located in an aftershock cluster trending NNE-SSW, highlighting a transverse fault with ∼6 km of strike-slip displacement that locally cuts the MAD Fault. In the El Kantour region (central MAD Fault), 31 events were recorded along a 3 km long fault segment, including the M_w 4.7 mainshock. The mainshock had a focal mechanism consistent with predominantly strike-slip motion on a N110°E-striking fault plane, in agreement with the WNW-ESE orientation of the central MAD Fault segment. Finally, six diffuse events occurred in the Hammam Debbagh region (eastern MAD Fault). A significant event (M_d 3.0) in this region had a focal mechanism consistent with strike-slip movement and a normal component trending NW-SE. This is consistent with the fault plane orientations of key events in the time period 2003–2014, likely related to the NW-SE-striking Hammam Debbagh Fault. The present-day stress tensor is characterized by a strike-slip tectonic regime and a σ₁ orientation (N342°E) that closely matches the maximum regional compressive stress orientation (NNW-SSE).

东北阿尔及利亚，143级小地震的序列（M _d ≤4.7）邻近4和3月16日，2017年之间的MCID AICHA-Debbagh（MAD）故障发生在这个序列中，地震活动的74％发生在头两个天。尽管地震规模不大，但它们产生了重要的新信息，并增进了我们对沿断层三个不同区域地震活动的了解。在思迪DRIS区域（西部MAD故障），106个事件（1≤中号_d ≤3.2）位于余震簇趋势NNE-SSW，突出用〜6公里走滑位移的那局部切割MAD的横向错故障。在El Kantour地区（中央MAD断层），沿着3 km长的断层段记录了31个事件，包括M _w4.7主震 主震的震源机制与在N110°E打击的断层平面上的主要走滑运动一致，与中央MAD断层段的WNW-ESE方向一致。最后，在哈马姆·德巴格地区（东部MAD断层）发生了6次扩散事件。该区域的一个重大事件（M _d 3.0）具有与走滑运动相一致的震源机制和趋势为北西向东南的正常分量。这与2003-2014年期间关键事件的断层平面方向一致，这很可能与NW-SE袭击的哈曼Debbagh断层有关。现今的应力张量的特征在于走滑构造体制和σ ₁取向（N342°E）的最大区域的压缩应力的方向（西北偏北-SSE）密切匹配。