Earthquake with magnitude of Md 4.3 on date 27-10-2002 and time 03:50:26 (Italy) in region 3 km NW Sant'Alfio (CT)

A magnitude Md 4.3 earthquake occured in region: 3 km NW Sant'Alfio (CT), on

  • 27-10-2002 02:50:26 (UTC)
  • 27-10-2002 03:50:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7600, 15.1160 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Alfio CT 3 1582 1582
Milo CT 4 1087 2669
Giarre CT 7 27659 30328
Mascali CT 7 14282 44610
Zafferana Etnea CT 7 9517 54127
Piedimonte Etneo CT 8 3963 58090
Riposto CT 8 14838 72928
Santa Venerina CT 8 8592 81520
Fiumefreddo di Sicilia CT 9 9623 91143
Linguaglossa CT 9 5403 96546
Calatabiano CT 12 5308 101854
Castiglione di Sicilia CT 14 3215 105069
Gaggi ME 15 3184 108253
Francavilla di Sicilia ME 16 3945 112198
Motta Camastra ME 16 845 113043
Trecastagni CT 16 10910 123953
Pedara CT 17 14102 138055
Viagrande CT 17 8563 146618
Moio Alcantara ME 17 717 147335
Acireale CT 17 52622 199957
Giardini-Naxos ME 17 9415 209372
Aci Sant'Antonio CT 17 17984 227356
Aci Catena CT 18 29851 257207
Graniti ME 18 1492 258699
Nicolosi CT 18 7463 266162
Aci Bonaccorsi CT 18 3524 269686
Taormina ME 18 10960 280646
Castelmola ME 18 1088 281734
Malvagna ME 19 733 282467
Randazzo CT 20 10900 293367
Valverde CT 20 7840 301207

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km N of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
62 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
97 Km E of Caltanissetta (63360 inhabitants)
99 Km NE of Ragusa (73313 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 4.3
MLNET 4.8
2002-10-27
02:50:26
37.76 15.116 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 455959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2002-10-27 02:50:26 ± 0.146
Latitude 37.7600 ± 0.0105
Longitude 15.1160 ± 0.0155
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 455959

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) 1791.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 56
Number of defining phases 56
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1
Epicentral distance of station closest to the epicenter (degree) 0.00453
Epicentral distance of station farthest from the epicenter (degree) 0.08451
Number of stations at which the event was observed 55
Number of stations from which data was used for origin computation 55
Magnitudes information

Md:4.3

Field Value
Value 4.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 455959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:11:39

ML:4.8

Field Value
Value 4.8
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 455959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:38:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VAI.Z. 2002-10-27T02:52:48.21 10.0 undecidable manual PN 332 0.0843 6.32 0
--.BRMO.Z. 2002-10-27T02:52:47.84 10.0 undecidable manual PN 339 0.0845 5.76 0
--.FVI.Z. 2002-10-27T02:52:39.23 10.0 undecidable manual PN 349 0.0809 2.6 0
--.PTCC.Z. 2002-10-27T02:52:35.19 10.0 undecidable manual PN 352 0.0786 2.1 0
--.CTI.Z. 2002-10-27T02:52:34.73 10.0 undecidable manual PN 343 0.0780 2.52 0
--.TRI.Z. 2002-10-27T02:52:25.74 10.0 undecidable manual PN 353 0.0720 2.68 0
--.ERBM.Z. 2002-10-27T02:52:24.74 10.0 undecidable manual PN 333 0.0678 8.11 0
--.GSCL.Z. 2002-10-27T02:52:22.76 10.0 undecidable manual PN 334 0.0667 7.79 0
--.ZCCA.Z. 2002-10-27T02:52:21.21 10.0 undecidable manual PN 336 0.0656 8.02 0
--.SEI.Z. 2002-10-27T02:52:17.68 10.0 undecidable manual PN 337 0.0621 9.81 0
--.BDI.Z. 2002-10-27T02:52:16.70 10.0 undecidable manual PN 333 0.0644 4.6 0
--.VMG.Z. 2002-10-27T02:52:11.51 10.0 undecidable manual PN 337 0.0608 5.57 0
--.PGD.Z. 2002-10-27T02:52:10.66 10.0 undecidable manual PN 338 0.0597 6.53 0
--.SFI.Z. 2002-10-27T02:52:08.15 10.0 undecidable manual PN 339 0.0595 4.16 0
--.CRE.Z. 2002-10-27T02:52:06.65 10.0 undecidable manual PN 338 0.0569 6.65 0
--.CSNT.Z. 2002-10-27T02:52:04.52 10.0 undecidable manual PN 334 0.0576 3.48 0
--.FSSB.Z. 2002-10-27T02:52:03.16 10.0 undecidable manual PN 344 0.0556 5.09 0
--.GRFL.Z. 2002-10-27T02:52:03.80 10.0 undecidable manual PN 331 0.0561 4.33 0
--.SNTG.Z. 2002-10-27T02:51:56.20 10.0 undecidable manual PN 344 0.0516 4.34 0
--.ASS.Z. 2002-10-27T02:51:53.69 10.0 undecidable manual PN 341 0.0505 3.4 0
--.MNS.Z. 2002-10-27T02:51:44.37 10.0 undecidable manual PN 338 0.0448 2.83 0
--.AQU.Z. 2002-10-27T02:51:41.28 10.0 undecidable manual PN 344 0.0429 2.61 0
--.PTQR.Z. 2002-10-27T02:51:38.84 10.0 undecidable manual PN 343 0.0401 4.51 0
--.RDP.Z. 2002-10-27T02:51:35.54 10.0 undecidable manual PN 336 0.0396 2 0
--.RNI2.Z. 2002-10-27T02:51:29.91 10.0 undecidable manual PN 349 0.0360 1.74 0
--.FGMS.Z. 2002-10-27T02:51:28.89 10.0 undecidable manual PN 9 0.0359 0.88 0
--.RGNG.Z. 2002-10-27T02:51:28.17 10.0 undecidable manual PN 5 0.0353 1.11 0
--.RFI.Z. 2002-10-27T02:51:24.58 10.0 undecidable manual PN 346 0.0328 1.42 0
--.FG5.Z. 2002-10-27T02:51:23.95 10.0 undecidable manual PN 1 0.0317 2.47 0
--.BRT.Z. 2002-10-27T02:51:21.77 10.0 undecidable manual PN 26 0.0313 0.79 0
--.FG4.Z. 2002-10-27T02:51:21.36 10.0 undecidable manual PN 5 0.0304 1.78 0
--.LCI.Z. 2002-10-27T02:51:21.36 10.0 undecidable manual PN 41 0.0312 0.63 0
--.CSSN.Z. 2002-10-27T02:51:16.63 10.0 undecidable manual PN 358 0.0278 0.95 0
--.MRLC.Z. 2002-10-27T02:51:15.21 10.0 undecidable manual PN 5 0.0270 0.78 0
--.SGO.Z. 2002-10-27T02:51:11.28 10.0 undecidable manual PN 3 0.0252 -0.31 0
--.ORI.Z. 2002-10-27T02:51:08.97 10.0 undecidable manual PN 23 0.0226 1.37 0.2
--.MGR.Z. 2002-10-27T02:51:05.31 10.0 undecidable manual PN 8 0.0215 -0.77 0.4
--.TDS.Z. 2002-10-27T02:51:02.11 10.0 undecidable manual PN 26 0.0191 -0.18 1
--.ERC.Z. 2002-10-27T02:51:01.27 10.0 undecidable manual PN 278 0.0181 0.5 1.1
--.CLTB.Z. 2002-10-27T02:50:55.40 10.0 undecidable manual PN 263 0.0136 1.46 2.2
--.USI.Z. 2002-10-27T02:50:55.98 10.0 undecidable manual PN 302 0.0161 -1.75 1.5
--.GRI.Z. 2002-10-27T02:50:53.71 10.0 undecidable manual PN 43 0.0132 0.34 2.4
--.MPG.Z. 2002-10-27T02:50:52.77 10.0 undecidable manual PN 286 0.0130 -0.21 2.2
--.MCT.Z. 2002-10-27T02:50:52.72 10.0 undecidable manual PN 263 0.0108 3.11 2.8
--.FAVR.Z. 2002-10-27T02:50:51.67 10.0 undecidable manual PN 247 0.0112 1.4 2.8
--.AGST.Z. 2002-10-27T02:50:45.45 10.0 undecidable manual SG 170 0.0045 -0.13 3.6
--.GIB.Z. 2002-10-27T02:50:43.47 10.0 undecidable manual PG 285 0.0079 -0.96 3.4
--.CSLB.Z. 2002-10-27T02:50:43.20 10.0 undecidable manual PG 282 0.0076 -0.57 3.4
--.SOI.Z. 2002-10-27T02:50:43.14 10.0 undecidable manual PG 66 0.0072 0.29 3.6
--.SLNA.Z. 2002-10-27T02:50:42.25 10.0 undecidable manual PG 344 0.0074 -1.07 3.5
--.SCLL.Z. 2002-10-27T02:50:40.27 10.0 undecidable manual PG 43 0.0062 -0.38 3.6
--.MEU.Z. 2002-10-27T02:50:40.22 10.0 undecidable manual PG 199 0.0062 -0.47 3.6
--.PZI.Z. 2002-10-27T02:50:40.23 10.0 undecidable manual PG 190 0.0064 -1.01 3.6
--.MSI.Z. 2002-10-27T02:50:38.13 10.0 undecidable manual PG 37 0.0050 -0.24 3.6
--.MTTG.Z. 2002-10-27T02:50:38.54 10.0 undecidable manual PG 62 0.0046 0.94 3.6
--.AGST.Z. 2002-10-27T02:50:37.50 10.0 undecidable manual PG 170 0.0045 -0.38 3.6
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, http://terremoti.ingv.it/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