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Moderate mag. 4.2 earthquake - 24 km northeast of Sciacca, Agrigento, Sicily, Italy, on Sunday, Aug 21, 2022 at 6:52 am (GMT +2) -

Moderate mag. 4.2 earthquake - 24 km northeast of Sciacca, Agrigento, Sicily, Italy, on Sunday, Aug 21, 2022 at 6:52 am (GMT +2) Moderate mag. 4.2 earthquake - 24 km northeast of Sciacca, Agrigento, Sicily, Italy, on Sunday, Aug 21, 2022 at 6:52 am (GMT +2)

Moderate magnitude 4.2 earthquake at 4 km depth

21 Aug 04:56 UTC: First to report: GFZ after 4 minutes.
21 Aug 04:59: Magnitude recalculated from 4.2 to 4.1. Epicenter location corrected by 2.2 km (1.4 mi) towards S.
21 Aug 05:18: Now using data updates from INGV
Update Sun, 21 Aug 2022, 05:24

Moderate tremor of magnitude 4.2 reported 24 km northeast of Sciacca, Italy

4.2 quake 21 Aug 6:52 am (GMT +2)
4.2 quake 21 Aug 6:52 am (GMT +2)
A magnitude 4.2 earthquake near Sciacca, Agrigente, Sicily, Italy, was reported 31 minutes ago by Italy's National Institute of Geophysics and Volcanology (INGV), considered the main national agency that monitors seismic activity in Italy. The earthquake occurred at a very shallow depth of 3.6 km beneath the epicenter early morning on Sunday, August 21st, 2022, at 6:52 am local time. Magnitude and other quake parameters can still change in the coming hours as the agency continues to process seismic data.
A second report was later issued by the German Research Centre for Geosciences (GFZ), which listed it as a magnitude 4.1 earthquake. Other agencies reporting the same quake include the European-Mediterranean Seismological Centre (EMSC) at magnitude 4.2, and the citizen-seismograph network of RaspberryShake at magnitude 4.1.
Based on the preliminary seismic data, the quake should have been widely felt by almost everyone in the area of the epicenter. It might have caused light to moderate damage.
Moderate shaking probably occurred in Giuliana (pop. 1,700) located 1 km from the epicenter.
Weak shaking might have been felt in Ribera (pop. 17,700) located 20 km from the epicenter, Sciacca (pop. 36,900) 24 km away, Castelvetrano (pop. 28,100) 40 km away, Alcamo (pop. 44,400) 42 km away, and Partinico (pop. 28,700) 43 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Monreale (pop. 22,000) located 45 km from the epicenter, Bagheria (pop. 53,000) 50 km away, and Palerm (pop. 648,300) 51 km away.

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Earthquake details

Date & timeAug 21, 2022 04:52:49 UTC -
Local time at epicenterSunday, Aug 21, 2022 at 6:52 am (GMT +2)
StatusConfirmed
Magnitude4.2
Depth3.6 km
Epicenter latitude / longitude37.6777°N / 13.2477°E (Provincia de Palermo, Sicily, Italy)
Antipode37.678°S / 166.752°W
Shaking intensityLight shaking
Felt17 reports
Primary data sourceINGV (Istituto Nazionale di Geofisica e Vulcanologia)
Nearest volcanoCampi Flegrei Mar Sicilia (74 km / 46 mi)
Nearby towns and cities1 km (1 mi) ENE of Giuliana (pop: 1,740) | Show on map | Quakes nearby
20 km (12 mi) N of Ribera (pop: 17,700) | Show on map | Quakes nearby
24 km (15 mi) NE of Sciacca (Province of Agrigento, Sicile) (pop: 36,900) | Show on map | Quakes nearby
40 km (25 mi) E of Castelvetrano (Provincia di Trapani) (pop: 28,100) | Show on map | Quakes nearby
42 km (26 mi) SE of Alcamo (Sicilia) (pop: 44,400) | Show on map | Quakes nearby
43 km (26 mi) SSE of Partinico (Provincia di Palermo, Sicilia) (pop: 28,700) | Show on map | Quakes nearby
51 km (32 mi) S of Palerm (pop: 648,300) | Show on map | Quakes nearby
473 km (294 mi) S of Rome (Latium) (pop: 2,318,900) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 19.3°C (67 F), humidity: 90%, wind: 1 m/s (3 kts) from N
Estimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
4.23.6 kmItaly: 1 Km E Giuliana (PA)INGV
4.111 kmSicily, ItalyRaspberryShake
4.14 kmSICILY, ITALYEMSC
4.110 kmSicily, ItalyGFZ
4.111 km7 Km ESE of Sciacca, ItalyUSGS
4.24 kmItaly: Burgio / ItalienZAMG

Seismograms

Seismic station: Castrocucco, Italy (CUC/MN network) | Distance from quake: 340 km / 211 mi | Show on map | Station Info
Seismic station Castrocucco, Italy: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (21)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Ribera (27.4 km S of epicenter) [Map] / Moderate shaking (MMI V) : i slept on the bed in the bedroom and was woken up by the earthquake because my bed moved a lot. i heard the ground moving under my feet it was quite loud. the earthquake was felt for about 1 minute | One user found this interesting.  
Sovareto(Sciacca) (22 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / both vertical and horizontal swinging / very short : Ero a letto, il quale si è spostato indietro e poi in avanti, provocando un rumore assordante sfregando sul pavimento. | One user found this interesting. (reported through our app)  
In house (23.2 km S of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : House shaking side to side | One user found this interesting.  
Lucca Sicula (11.8 km SSE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : It woke me up. It rattled my bed and my chandeliers were moving | One user found this interesting.  
San Biagio Platani, Province of Agrigento, Sicily (30.9 km SE of epicenter) [Map] / Very weak shaking (MMI II) : Si è mosso il letto e oscillato il lampadario | One user found this interesting.  
Ribera, Agrigento / not felt : Es ist was umgefallen, das war’s | One user found this interesting.  
Qawra / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s : Light and short swinging | One user found this interesting. (reported through our app)  
Sciacca (23.9 km SW of epicenter) [Map] / not felt
Sciacca (23.9 km SW of epicenter) [Map] / not felt
Ribera sicilia (19.4 km S of epicenter) [Map] / Very weak shaking (MMI II)
Sciacca, Agrigente, Sicile (23.4 km SW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Leichtes schütteln  
RIBERA / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : Letto che tremava (reported through our app)  
Halle Saale / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : Kaffee übergeschwappt  
Timpi Russi San Georgio / Light shaking (MMI IV) / 5-10 s
Balzan / not felt (reported through our app)
In bed in sciacca / Weak shaking (MMI III) / rattling, vibrating
Sciacca / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Sciacca / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Villafranca / Light shaking (MMI IV) / both vertical and horizontal swinging / 15-20 s
92016 / Light shaking (MMI IV)
Lucca Sicula / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
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Earlier earthquakes in the same area

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