The 19 July 2019 earthquake in Athens, Greece: A delayed major aftershock of the 1999 Mw = 6.0 event, or the activation of a different structure?

The 27 September 2021 Earthquake in Central Crete (Greece)—Detailed Analysis of the Earthquake Sequence and Indications for Contemporary Arc-Parallel Extension to the Hellenic Arc

“…The mainshock apparently broke a large asperity of a west-dipping normal fault and distributed stresses towards its northern and southern edges, triggering aftershocks mainly at two large groups, separated by a spatial gap, where the asperity was located. Similar cases have been previously reported in other significant earthquakes on normal faults in Greece, including the 1999 Athens [79,80], the 2017 Kos [81,82], and the 2020 Samos [83][84][85][86] earthquakes. The herein presented relocation analysis of the sequence during its second period, i.e., with data from the temporary local network that was deployed by GI-NOA, permitted the detailed delineation of the main activated structures which could be related to mapped faults on the surface, allowing for a small degree of listricity, as well as contingent smaller antithetic, conjugate faults at depth.…”

Evaluation of macroseismic intensity, strong ground motion pattern and fault model of the 19 July 2019 Mw5.1 earthquake west of Athens

“…During the 1999 M6.0 earthquake, intensity values 8 and 9 were assigned at larger epicentral distances inside the Athens basin, while intensities 7 were estimated near the epicentre (Anastasiadis et al 1999). The SE spatiotemporal propagation of the 19 July 2019 aftershock sequence was observed by Kapetanidis et al (2020).…”

“…On 19 July 2019, 11:13 GMT (14:13 local time), a strong, damaging earthquake with magnitude M w 5.1 (Fig. 1) and 8 km depth (NKUA solution; Kapetanidis et al 2020) struck the broader area of Athens, causing damage to its western suburbs. This moderate event signalled a general alarm in the whole metropolitan area with people rushing out of buildings, resulting in interruption of mobile communication for at least 2 h and heavy traffic jams.…”

Estimation of Earthquake Early Warning Parameters for Eastern Gulf of Corinth and Western Attica Region (Greece). First Results

“…Its shallow focus and proximity to the capital [ 33 , 34 ], as well as issues with constructions on unsuitable sites [ 35 ], were the culprits for the high intensities observed. More recently, in 2019, a M w = 5.2 earthquake occurred in the same structure [ 36 ], acting as a reminder of the danger posed by active faults in the vicinity of Athens ( Figure 1 ); other than a partial collapse of an abandoned building, the city was left unscathed, even though its western outskirts sustained some damage [ 37 ]. The region NW of Parnithta also hosts faults that cause shallow seismicity (with potential moderate to strong events) and, consequently, could have an impact on Athens [ 38 ].…”

“…This set included two sites in Loutraki (LOUT and LTK) and two in Athens (ATH and ATHU). These sites feature long-term installations (ensuring a wealth of available data) and are located close to the two most important seismic sources around the local industrial infrastructure (e.g., oil refineries) and the metropolitan city of Athens, i.e., Alkyonides [41,42] and Parnitha [32][33][34][35][36][37]. All four stations have broadband sensors.…”