On July 13, 2019, a moderate earthquake shook the Jijel region of Algeria, ~300 km east of Algiers (Capital of Algeria). In the past, the Jijel region experienced a destructive earthquake (I₀: X) on 21–22 August 1856, triggering a moderate tsunami in the western Mediterranean region. The 2019 event is the second important event to have occurred along this part of the Algerian margin, which has been undergoing an inversion process since the Pliocene Epoch. The event occurred 40 km to the north of Jijel City, at 10 km depth. No property damage or injuries were associated with this event. The seismic moment release estimated from waveform modeling was M₀ = 3 × 10¹⁶ Nm, corresponding to a Mw 5.0 event. The mainshock focal mechanism is associated with the rupture of an E–W thrust fault that is clarified by a 4-km-long × 10-km-wide aftershock cluster along the continental slope of the Jijel margin. In the same area, ~30 km to the west and offshore of the coastal village of Ziama–Mansouriah (west of Jijel) a Mw 4.1 earthquake occurred in 2014. This event is also associated with the rupture of a western contiguous E–W thrust fault. Stress tensor inversion produces a main (σ₁) maximum stress axis oriented N356E, which is in agreement with previous stress studies of the Lesser Kabylia–Babors block. The present-day stress field is characterized by a compressional tectonic regime (R' = 2.96 ± 0.21). Coulomb stress analysis of the 2014 Ziama and 2019 Jijel earthquakes indicates that the two earthquakes appear to be individually triggered events with no stress transfer between them. The 2019 Jijel earthquake is associated with one of the three active en echelon faults that have already been identified in the central part of the Algerian margin via recent marine surveys. It belongs to the serie of many moderate seismic events that have recently affected the Algerian margin (Boumerdes, Algiers, Bejaia), and is representative of the active deformation process along the Algerian margin that is marked by the initiation of an incipient subduction zone with a progressive plate boundary migration since the late Miocene.

2019年7月13日，一场中等地震震撼了阿尔及利亚的吉耶尔地区，该地区位于阿尔及尔（阿尔及利亚的首都）以东约300公里处。过去，吉耶尔地区在1856年8月21日至22日经历了破坏性地震（I ₀ ：X），在地中海西部地区引发了中度海啸。自上新世以来，2019年事件是阿尔及利亚边缘这一部分发生的第二个重要事件。该事件发生在吉耶尔市以北40公里处，深度为10公里。没有财产损失或伤害与此事件有关。根据波形建模估算的地震矩释放为M ₀  = 3×10 ¹⁶Nm，对应于Mw 5.0事件。主震震源机制与Ｅ－Ｗ逆冲断裂的破裂有关，该断裂由沿着吉耶尔边缘大陆坡的４ｋｍｍ长×１０ｋｍｍ宽的余震簇所阐明。在同一地区，距沿海村庄Ziama–Mansouriah（吉耶尔以西）以西和近海处约30公里，2014年发生了4.1级Mw地震。该事件还与西部连续的E–W逆冲断裂有关。过错。应力张量反转产生一个主（ σ ₁）最大应力轴线定向N356E，这是在与所述小卡比利亚-Babors块的先前的应力研究一致。现今的应力场的特征是构造受压构造（ R' = 2.96±0.21）。对2014年Ziama和2019年Jijel地震的库仑应力分析表明，两次地震似乎是单独触发的事件，它们之间没有应力传递。通过最近的海洋调查，已经在阿尔及利亚边缘的中部确定了2019年的吉耶尔地震与三个活跃的梯形断层之一。它属于最近影响阿尔及利亚边缘（Boumerdes，Algiers，Bejaia）的许多中等地震事件的意向，并且代表了沿阿尔及利亚边缘的主动变形过程，其特征是开始的俯冲带开始形成俯冲。自中新世晚期以来，板块边界逐渐进行迁移。