Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.3 on date 14-07-1991 and time 14:27:01 (Italy) in region 1 km S Castel di Lucio (ME)

A magnitude Md 3.3 earthquake occured in region: 1 km S Castel di Lucio (ME), on

  • 14-07-1991 12:27:01 (UTC)
  • 14-07-1991 14:27:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8790, 14.3150 at 5 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castel di Lucio ME 1 1294 1294
Mistretta ME 7 4791 6085
Pettineo ME 10 1350 7435
Reitano ME 11 806 8241
Motta d'Affermo ME 12 739 8980
San Mauro Castelverde PA 12 1701 10681
Gangi PA 13 6811 17492
Sperlinga EN 13 805 18297
Tusa ME 14 2925 21222
Geraci Siculo PA 14 1945 23167
Capizzi ME 15 3176 26343
Santo Stefano di Camastra ME 16 4694 31037
Nicosia EN 16 13899 44936
Cerami EN 19 2006 46942
Pollina PA 20 2974 49916
Caronia ME 20 3364 53280

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Caltanissetta (63360 inhabitants)
74 Km E of Bagheria (55387 inhabitants)
80 Km NW of Catania (314555 inhabitants)
81 Km W of Acireale (52622 inhabitants)
88 Km E of Palermo (674435 inhabitants)
90 Km NE of Agrigento (59770 inhabitants)
91 Km N of Gela (75827 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 3.3
ML-VAX 2.8 		1991-07-14
12:27:01		 37.879 14.315 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 145409
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-07-14 12:27:01 ± 0.205
Latitude 37.8790 ± 0.0174
Longitude 14.3150 ± 0.0160
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 145409

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2385.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.02453
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 145409
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:15:45

ML:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 145409
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ORI.Z. 1991-07-14T12:27:47.50 10.0 undecidable manual PN 36 2.7195 1.77 0.1
--.MGR.Z. 1991-07-14T12:27:41.29 10.0 undecidable manual PN 22 2.442 -0.66 0.8
--.MMN.Z. 1991-07-14T12:27:41.20 10.0 undecidable manual PN 32 2.3865 0.04 1.1
--.TDS.Z. 1991-07-14T12:27:40.83 10.0 undecidable manual PN 40 2.3754 -0.08 1.1
--.PZI.Z. 1991-07-14T12:27:36.25 10.0 undecidable manual SG 148 0.9657 1.02 0.3
--.MEU.Z. 1991-07-14T12:27:34.50 10.0 undecidable manual SG 151 0.8658 2.3 0
--.AU9.Z. 1991-07-14T12:27:34.90 10.0 undecidable manual SG 130 0.9435 0.05 0.6
--.CZI.Z. 1991-07-14T12:27:34.12 10.0 undecidable manual PN 45 1.9536 -0.95 0.7
--.GRI.Z. 1991-07-14T12:27:34.00 10.0 undecidable manual PN 59 1.8981 -0.35 1.2
--.PA2.Z. 1991-07-14T12:27:33.28 10.0 undecidable manual PN 69 1.7649 0.64 1
--.SA1.Z. 1991-07-14T12:27:31.19 10.0 undecidable manual SG 30 0.7881 1.37 0.2
--.LVI.Z. 1991-07-14T12:27:30.23 10.0 undecidable manual PN 274 1.554 0.52 1.2
--.FE2.Z. 1991-07-14T12:27:28.22 10.0 undecidable manual PN 82 1.3986 0.66 1.1
--.SOI.Z. 1991-07-14T12:27:28.27 10.0 undecidable manual PN 81 1.3764 1 0.8
--.ERC.Z. 1991-07-14T12:27:27.99 10.0 undecidable manual PN 276 1.3653 0.91 0.9
--.DR2.Z. 1991-07-14T12:27:27.68 10.0 undecidable manual PN 58 1.4763 -0.93 0.8
--.GA2.Z. 1991-07-14T12:27:25.60 10.0 undecidable manual PN 75 1.221 -0.05 1.6
--.CVT.Z. 1991-07-14T12:27:25.90 10.0 undecidable manual PN 260 1.2099 0.89 0.9
--.GMB.Z. 1991-07-14T12:27:25.26 10.0 undecidable manual PN 75 1.221 0.16 1.6
--.USI.Z. 1991-07-14T12:27:23.40 10.0 undecidable manual PN 313 1.2099 -1.94 0.1
--.MO9.Z. 1991-07-14T12:27:23.20 10.0 undecidable manual PN 82 1.0878 -0.26 1.5
--.AU9.Z. 1991-07-14T12:27:20.80 10.0 undecidable manual PG 130 0.9435 -0.64 1.2
--.PZI.Z. 1991-07-14T12:27:19.79 10.0 negative manual PG 148 0.9657 -1.15 1.3
--.ATN.Z. 1991-07-14T12:27:19.94 10.0 undecidable manual PG 72 0.9435 -0.67 1.2
--.MEU.Z. 1991-07-14T12:27:18.50 10.0 undecidable manual PG 151 0.8658 -0.7 1.2
--.SA1.Z. 1991-07-14T12:27:17.43 10.0 undecidable manual PG 30 0.7881 -0.39 1.5
--.GIO.Z. 1991-07-14T12:27:17.00 10.0 undecidable manual PG 116 0.6882 0.93 0.9
--.MNO.Z. 1991-07-14T12:27:12.97 10.0 undecidable manual SG 79 0.2997 -0.32 0.6
--.GIB.Z. 1991-07-14T12:27:11.78 10.0 undecidable manual SG 295 0.2553 0.48 0.6
--.MNO.Z. 1991-07-14T12:27:08.39 10.0 negative manual PG 79 0.2997 0.12 3.2
--.GIB.Z. 1991-07-14T12:27:06.77 10.0 undecidable manual PG 295 0.2553 -0.36 1.5
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download