Terremoto moderato mag. 4.3 - Palmarejo Barrio, Lajas, 28 km a sud da Mayaguez, Portorico, 18 Jul 12:45 am (GMT -4) -

Terremoto moderato mag. 4.3 - Palmarejo Barrio, Lajas, 28 km a sud da Mayaguez, Portorico, 18 Jul 12:45 am (GMT -4)

Terremoto moderato magnitudine 4.3 at 11 km depth

18 Jul 04:56 UTC: Primo a segnalare: USGS dopo 11 minuti.
18 Jul 10:54: Magnitudine ricalcolata da 4.4 a 4.3. Profondità ricalcolata da 16.9 a 11.0 km (da 10.5 a 6.8 mi). Posizione dell'epicentro corretta di 7.4 km (4.6 mi) al NNE.
Update Sun, 18 Jul 2021, 05:03
Magnitude 4.4 earthquake strikes near Mayaguez, Mayagüez Barrio-Pueblo, Mayagüez, Puerto Rico
4.4 quake 18 Jul 12:45 am (GMT -4)
4.4 quake 18 Jul 12:45 am (GMT -4)
A shallow magnitude 4.4 earthquake was reported after midnight near Mayaguez, Mayagüez Barrio-Pueblo, Mayagüez, Puerto Rico.
According to the United States Geological Survey, the quake hit on Sunday 18 July 2021 at 12:45 am local time at a shallow depth of 16.9 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.4 earthquake as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in La Parguera (pop. 1,100) located 12 km from the epicenter, Lajas (pop. 5,300) 19 km away, Cabo Rojo (pop. 10,800) 22 km away, San German (pop. 12,100) 22 km away, Guanica (pop. 9,200) 24 km away, Sabana Grande (pop. 9,000) 26 km away, Hormigueros (pop. 11,900) 28 km away, and Mayaguez (pop. 78,600) 34 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Aibonito (pop. 8,900) located 94 km from the epicenter, and Guayama (pop. 21,600) 107 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.
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Earthquake data

Data & ora: 18 Jul 2021 04:45:42 UTC -
Ora locale a epicentro: 18 Jul 12:45 am (GMT -4)
Magnitudine: 4.3
Prof.: 11.0 km
Epicentro latitudine / longitudine: 17.9553°N / 67.0951°W (Palmarejo Barrio, Lajas, Portorico)
Antipode: 17.955°S / 112.905°E
Nearby towns and cities:
6 km OSO da La Parguera (pop: 1,140) --> Vedi sismi vicini
11 km SSO da Lajas (pop: 5,260) --> Vedi sismi vicini
15 km SSO da San German (San Germán) (pop: 12,100) --> Vedi sismi vicini
16 km SSE da Cabo Rojo (pop: 10,800) --> Vedi sismi vicini
20 km SO da Sabana Grande (pop: 8,960) --> Vedi sismi vicini
20 km O da Guanica (Guánica) (pop: 9,220) --> Vedi sismi vicini
21 km S da Hormigueros (pop: 11,900) --> Vedi sismi vicini
27 km OSO da Yauco (pop: 20,300) --> Vedi sismi vicini
28 km S da Mayaguez (Mayagüez) (pop: 78,600) --> Vedi sismi vicini
28 km SSO da Maricao (pop: 1,170) --> Vedi sismi vicini
111 km OSO da Bayamon (Bayamón) (pop: 203,500) --> Vedi sismi vicini
119 km OSO da San Juan (pop: 418,100) --> Vedi sismi vicini
71 km OSO da Puerto Rico Island (pop: 3,474,200) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Clear Sky 25.2°C (77 F), humidity: 81%, wind: 0 m/s (1 kts) from E
Fonte dati primaria: USGS (United States Geological Survey)
Stima dell'energia sismica liberata: 1.8 x 1011 joules (49.4 MWh, equivalent to 42.5 tons of TNT) More info
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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.Prof.UbicazioneFonte
4.311 km5 Km WSW of La Parguera, Puerto RicoUSGS
4.417 kmPUERTO RICO REGIONEMSC

User reports for this quake (13)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Cabo Rojo (15.4 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Again, heard it coming and the bed jerk (left to right). | 2 users found this interesting. (reported through our app)  
Quebradillas PR (60.8 km NNE of epicenter) [Map] / not felt : Felt nothing | One user found this interesting. (reported through our app)  
Manati, Manatí Barrio-Pueblo (82.9 km NE of epicenter) [Map] / not felt (reported through our app)
Playita Cortada, Descalabrado Barrio, Santa Isabel (70.3 km E of epicenter) [Map] / not felt
Sabana Grande (19.8 km NE of epicenter) [Map] / Weak shaking (MMI III) / 5-10 s
Mayagüez (25 km N of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s
Calle Vasquez Quebradillas (0.1 km W of epicenter) [Map] / not felt
San German Puerto Rico (31.9 km W of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s : Felt my room shaking from side to side. It happen twice  
San sebastian (43.9 km NNE of epicenter) [Map] / Light shaking (MMI IV) : Leve (reported through our app)  
Vieques Island PR (172.6 km E of epicenter) [Map] / not felt (reported through our app)
Joyuda / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Boqueron / Light shaking (MMI IV) / 5-10 s
Cabo Rojo, Puerto Rico (14.7 km NW of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s (reported through our app)
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