Earthquake with magnitude of ML 1.6 on date 03-08-2011 and time 04:44:49 (Italy) in region Costa Calabra sud orientale (Reggio di Calabria)

A magnitude ML 1.6 earthquake occured in region: Costa Calabra sud orientale (Reggio di Calabria), on

  • 03-08-2011 02:44:49 (UTC)
  • 03-08-2011 04:44:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8, 16.16 at 30 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Brancaleone RC 19 3584 3584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km SE of Reggio di Calabria (183035 inhabitants)
69 Km SE of Messina (238439 inhabitants)
90 Km E of Acireale (52622 inhabitants)
Recent and historical Seismicity
Seismic hazard
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Md 1.8
ML 1.6
37.8 16.16 30 2014-10-21
Bollettino Sismico Italiano INGV 1267889
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2011-08-03 02:44:49 ± 0.59
Latitude 37.80 ± 0.03
Longitude 16.16 ± 0.03
Depth (km) 30 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1267889


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4053
Semi-minor axis of confidence ellipse (meter) 2105
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 4534.3
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 342
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50272
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 3
Magnitudes information


Field Value
Value 1.6
Uncertainty 0.6
Num. used stations
Type of magnitude ML
Reference to an origin 1267889
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:01:19


Field Value
Value 1.8
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1267889
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:01:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MSC.EHZ. 2011-08-03T02:45:27.24 10.0 undecidable manual Sg 0 0 0
IV.MSC.EHZ. 2011-08-03T02:45:25.88 10.0 undecidable manual Pg 0 0 0
IV.FIR.HHE. 2011-08-03T02:45:14.90 10.0 undecidable manual Pg 0 0 0
IV.SSFR.HHZ. 2011-08-03T02:45:09.16 10.0 undecidable manual Sg 0 0 0
MN.CEL.HHN. 2011-08-03T02:45:08.08 0.6 undecidable manual Sg 335 0.5027 0.013 51
IV.SSFR.HHZ. 2011-08-03T02:45:07.05 10.0 undecidable manual Pg 0 0 0
IV.HLNI.HHN. 2011-08-03T02:45:06.75 10.0 undecidable manual Sg 0 0 0
IV.LAV9.HHN. 2011-08-03T02:45:06.88 10.0 undecidable manual Pg 0 0 0
IV.GMB.BHE. 2011-08-03T02:45:06.37 0.3 undecidable manual Sg 325 0.4488 -0.231 75
IV.POZ.EHZ. 2011-08-03T02:45:05.57 10.0 undecidable manual Pg 0 0 0
IV.SOI.EHZ. 2011-08-03T02:45:02.64 0.3 undecidable manual Sg 343 0.2833 0.208 77
MN.CEL.HHN. 2011-08-03T02:45:00.64 0.6 undecidable manual Pg 335 0.5027 0.349 48
IV.GMB.BHE. 2011-08-03T02:44:59.82 0.3 undecidable manual Pg 325 0.4488 0.376 72
IV.SOI.EHZ. 2011-08-03T02:44:56.68 0.1 undecidable manual Pg 343 0.2833 -0.357 100
IV.HLNI.HHN. 2011-08-03T02:44:54.99 10.0 undecidable manual Pg 0 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:0 0.00025 0.08 AML other m 2011-08-03T02:44:54.99
IV.HLNI.HHE. ML:0 0.00022 0.2 AML other m 2011-08-03T02:44:54.99
IV.GMB.BHN. ML:2.1 0.000245 0.16 AML other m 2011-08-03T02:44:59.82
IV.GMB.BHE. Md:1.8 18.9 END duration s
MN.CEL.HHN. Md:1.8 17.9 END duration s
MN.CEL.HHE. ML:1.2 3.0E-5 0.62 AML other m 2011-08-03T02:45:00.64
IV.SOI.EHZ. Md:1.7 17.6 END duration s
IV.LAV9.HHN. Md:0 24 END duration s
IV.SSFR.HHZ. Md:0 12.9 END duration s
IV.FIR.HHE. Md:0 36 END duration s
IV.MSC.EHZ. Md:0 12.2 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download