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Mag. 4.8 earthquake - North Atlantic Ocean, 6.7 km northeast of Cayo Punta Arenas Island, Cuba, on Sunday, Mar 9, 2014, at 07:26 am (Havana time)

A strong magnitude 4.8 earthquake occurred in the North Atlantic Ocean near Cayo Punta Arenas island, Cuba, in the morning of Sunday, Mar 9, 2014 at 7.26 am local time (America/Havana GMT -4). The quake had a very shallow depth of 10 km (6 mi) and was felt widely in the area. The shallow depth of the quake caused it to be felt more strongly near the epicenter than a deeper quake of similar magnitude would.

Mag. 4.8 earthquake - North Atlantic Ocean, 6.7 km northeast of Cayo Punta Arenas Island, Cuba, on Sunday, Mar 9, 2014, at 07:26 am (Havana time) Mag. 4.8 earthquake - North Atlantic Ocean, 6.7 km northeast of Cayo Punta Arenas Island, Cuba, on Sunday, Mar 9, 2014, at 07:26 am (Havana time)

Moderate magnitude 4.8 earthquake at 10 km depth

9 Mar 11:42 UTC: First to report: EMSC after 16 minutes.

Earthquake details

Date & timeMar 9, 2014 11:26:18 UTC
Local time at epicenterSunday, Mar 9, 2014, at 07:26 am (America/Havana GMT -4)
StatusPreliminary (automatic detection)
Magnitude4.8
Depth10.0 km
Epicenter latitude / longitude23.25°N / 80.69°W North Atlantic Ocean, Cuba
Seismic antipode23.25°S / 99.31°E
Shaking intensityModerate shaking near epicenter
Felt26 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Estimated seismic energy released1 x 1012 joules (278 megawatt hours, equivalent to 239 tons of TNT) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Matanzas, a city with more than 150,000 inhabitants in Cuba, in 94 km (58 mi) distance west of the epicenter. People likely experienced weak shaking there. Many smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of  Cuba, La Habana, 174 km (108 mi) away from the epicenter, the earthquake was probably felt as very weak shaking.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
32 km (20 mi)
S of epicenter
Corralillo
(pop: 51,900)
IV: Light
Villa Clara
58 km (36 mi)
SW of epicenter
Cardenas
(pop: 98,500)
III: Weak
Provincia de Matanzas
63 km (39 mi)
S of epicenter
Colon
(pop: 63,900)
III: Weak
Provincia de Matanzas
63 km (39 mi)
SW of epicenter
Perico
(pop: 24,100)
III: Weak
Provincia de Matanzas
71 km (44 mi)
SW of epicenter
Jovellanos
(pop: 47,200)
III: Weak
Provincia de Matanzas
80 km (50 mi)
SE of epicenter
Sagua la Grande
(pop: 62,100)
III: Weak
Villa Clara
92 km (57 mi)
SW of epicenter
Jagüey Grande
(pop: 54,400)
III: Weak
Provincia de Matanzas
94 km (58 mi)
W of epicenter
Matanzas
(pop: 146,700)
III: Weak
Provincia de Matanzas
120 km (74 mi)
SE of epicenter
Santa Clara
(pop: 250,500)
III: Weak
Villa Clara
174 km (108 mi)
W of epicenter
La Habana
(pop: 2,163,800)
II: Very weak
La Habana
Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake (34)

We received 26 reports for this quake.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
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Blau marina resort. / Weak shaking (MMI III)
Nova Scotia/ Was on first floor in a condo in Vara / Light shaking (MMI IV) : Was in Varadero in a condo on the first floor in the bathroom on toilet, toilet seat moved, shower rod and curtain. Slight ground movement. Was very quick. I had experienced an earthquake before in   
calgary / Light shaking (MMI IV) : Woken by the tremor in a resort in Varadero Cuba...having never experienced a quake/tremor before, did not immediately know what was up. Rumble and building shook. Nothing displaced in our suite. Short duration.  
vare / Light shaking (MMI IV) : In a resort in Varadero Cuba. Awoke to bed moving back and forth. Similar to experience in Toronto some 10 yrs ago  
Little Torch Key, Florida USA 33042 / Light shaking (MMI IV) : 03/09/14 0726 Hrs EDT: A "sonic boom-like" concusion   
Key west / Violent shaking (MMI IX) : I felt it this am. Room shook stopped them brief shaking again. It startled me  
Englewood Florida / Very weak shaking (MMI II) : Bed shook for 10-15 seconds.   
Fort lauderdale, zip code 33304 / Very weak shaking (MMI II) : Live on the 5th floor. Sitting on sofa, legs crossed, my foot moved without my doing it. My spouse was sleeping and the mouvement of the bed woke him.  
Cudjoe key, FL / Strong shaking (MMI VI)
Marathon, Florida / Very weak shaking (MMI II) : Woke up from sleeping. Thought my significant other was having a nightmare.  
Punta Gorda / Light shaking (MMI IV) : 13 story tower, felt significant shaking, rattled all the blinds, sloshed water in the water cooler. Lasted around a whole minute.  
Big Pine Key, Florida / Light shaking (MMI IV) : Myself and two other guests were awakened by our beds shaking. We were all in different rooms of my home in Big Pine Key, Florida.  
key west / Severe shaking (MMI VIII)
Ft myers! FLORIDA 10th floor condo / Light shaking (MMI IV) : Was in bed, thought I was getting dizzy till I saw the fan which was off! move. 2nd one.  
Ft Lauderdale, fl / Very weak shaking (MMI II) : Was reading and suddenly had a weird sensation of movement . Looked up from paper and saw top of TV has slight sway. Felt one more after original . Live 9th floor in high rise   
Punta Gorda / Light shaking (MMI IV)
Key west lf / Light shaking (MMI IV)
3930 S Roosevelt Blvd , key west Florida 33040 / Light shaking (MMI IV) : Right around 7:30 am I felt my bed shake- vibrate & both my bedroom closet doors shook- vibrated as well! It freaked me out! Was pretty alarming actually!   
3930 S Roosevelt Blvd / Violent shaking (MMI IX) : Right around 7:30 am I felt my bed shake- vibrate & both my bedroom closet doors shook- vibrated as well! It freaked me out! Was pretty alarming actually!   
Sugarloaf, FL / Light shaking (MMI IV)
Marathon Shores, FL / Light shaking (MMI IV)
Marathon, FL / Very weak shaking (MMI II) : I sleep on the upper floor of a concret  
Big Pine Key / Light shaking (MMI IV) : It woke me up. The house was swaying, pictures and windows were rattling. It's a stilt house, so this was on the equivalent in the 2nd floor.  
Varadero, Cuba / Moderate shaking (MMI V)
Big Pine Key, Florida / Violent shaking (MMI IX)
Big Pine Key, Florida / Very strong shaking (MMI VII) : Woke up from sleep in shaking bed.  
(United States, 182 km NW of epicenter) : Very Loud Rumbling, much as if a car backed into the house several times (reported through EMSC)  
Key West (United States, 182 km NW of epicenter) : I had a craft project hanging on my chain link fence (was spray painting) and I heard it jingle around and fall off! Couldn't understand why, it's a relatively calm day. Then saw people talking about the earthquake on face book. (reported through EMSC)  
Key Largo (United States, 208 km N of epicenter) : Earthquake was felt while sitting in a chair at a desk. Other furniture rattled but not strong enough to actually s (reported through EMSC)  
Cudjoe Key (United States, 176 km NW of epicenter) : This was my first direct experience with an earthquake,so please accept my observations with that in mind. Note: I was awakened by wh (reported through EMSC)  
Sarasota (United States, 488 km NW of epicenter) : I was asleep and bed began to shake and I thought it was an earthquake and verified it on this site (reported through EMSC)  
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What is Intensity and the Mercalli Intensity Scale?


The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.
Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.
Read more about the MMI scale!

Compare Quake Data

Data for the same earthquake as reported by different agencies

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 Depth Time GMT
2014-03-9
Epicenter Agency
4.8 10 km
6.2 mi
(*)
11:26:18 CUBA REGION EMSC (European-Mediterranean Seismological Centre)
4.7 9.4 km
5.8 mi
11:26:17 27km NW of Corralillo, Cuba
9.7 km (6 mi) epicenter difference with EMSC
USGS (United States Geological Survey)
Notes:
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.

Seismograms

Seismic station: Disney Wilderness Preserve, Florida, USA (DWPF/IU network) | Distance from quake: 546 km / 339 mi | Show on map | Station Info
Seismic station Disney Wilderness Preserve, Florida, USA: 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: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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Aftershocks for this quake

No aftershocks have been recorded so far. When aftershocks are detected, we will update this section.

What are aftershocks?


Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.
[More info]

What about this quake?


Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface of approx. 6 km2 (=2 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 4 km (3 mi).
[More info]


Recorded aftershocks, latest first (0 quake)

Date and Time GMTMag
Depth
DistanceRegionDetails
Mar 9, 2014 07:26 am (Havana)
10 years ago - felt
4.8

10 km
0 km - This quakeNorth Atlantic Ocean, 6.7 km NE of Cayo Punta Arenas Island, Cuba
Main Shock (this quake)
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Map of aftershocks

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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