Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 3.5 on date 15-07-2001 and time 02:14:18 (Italy) in region 4 km N Nicolosi (CT)

A magnitude Md 3.5 earthquake occured in region: 4 km N Nicolosi (CT), on

  • 15-07-2001 00:14:18 (UTC)
  • 15-07-2001 02:14:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6480, 15.0310 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
Nicolosi CT 4 7463 7463
Pedara CT 4 14102 21565
Trecastagni CT 5 10910 32475
Viagrande CT 7 8563 41038
Belpasso CT 8 28108 69146
Ragalna CT 8 3924 73070
San Pietro Clarenza CT 8 7743 80813
Zafferana Etnea CT 8 9517 90330
Mascalucia CT 8 31958 122288
Tremestieri Etneo CT 9 20589 142877
Aci Bonaccorsi CT 9 3524 146401
Camporotondo Etneo CT 9 5023 151424
Aci Sant'Antonio CT 10 17984 169408
San Giovanni la Punta CT 10 23060 192468
Gravina di Catania CT 10 25838 218306
Santa Venerina CT 11 8592 226898
Sant'Agata li Battiati CT 11 9479 236377
Aci Catena CT 11 29851 266228
Valverde CT 11 7840 274068
Milo CT 11 1087 275155
San Gregorio di Catania CT 11 11966 287121
Acireale CT 13 52622 339743
Santa Maria di Licodia CT 13 7641 347384
Paternò CT 14 48228 395612
Biancavilla CT 14 24007 419619
Misterbianco CT 14 49410 469029
Aci Castello CT 14 18723 487752
Sant'Alfio CT 15 1582 489334
Motta Sant'Anastasia CT 16 12116 501450
Giarre CT 16 27659 529109
Catania CT 17 314555 843664
Adrano CT 18 36122 879786
Riposto CT 18 14838 894624
Mascali CT 19 14282 908906

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Acireale (52622 inhabitants)
17 Km N of Catania (314555 inhabitants)
69 Km NW of Siracusa (122291 inhabitants)
74 Km SW of Reggio di Calabria (183035 inhabitants)
76 Km SW of Messina (238439 inhabitants)
85 Km NE of Ragusa (73313 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
89 Km NE of Vittoria (63339 inhabitants)
91 Km N of Modica (54633 inhabitants)
95 Km NE 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 3.5
ML-VAX 2.4 		2001-07-15
00:14:18		 37.648 15.031 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 423619
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2001-07-15 00:14:18 ± 0.192
Latitude 37.6480 ± 0.0139
Longitude 15.0310 ± 0.0158
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 423619

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) 2077.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00348
Epicentral distance of station farthest from the epicenter (degree) 0.02930
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

Md:3.5

Field Value
Value 3.5
Uncertainty
Num. used stations 8
Type of magnitude Md
Reference to an origin 423619
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:39:31

ML:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 10
Type of magnitude ML
Reference to an origin 423619
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
--.CSI.Z. 2001-07-15T00:15:27.37 10.0 undecidable manual SN 24 2.3421 1.04 0.3
--.CZI.Z. 2001-07-15T00:15:13.20 10.0 undecidable manual SN 28 1.7871 0 0.7
--.LTRZ.Z. 2001-07-15T00:15:10.58 10.0 undecidable manual PN 24 3.2523 0.37 1.1
--.MRLC.Z. 2001-07-15T00:15:09.41 10.0 undecidable manual PN 6 3.1191 1.06 0.7
--.SGO.Z. 2001-07-15T00:15:06.77 10.0 undecidable manual PN 3 2.9082 1.29 0.6
--.PTS.Z. 2001-07-15T00:15:01.55 10.0 undecidable manual PN 251 2.553 1.03 0.8
--.MGR.Z. 2001-07-15T00:14:59.48 10.0 undecidable manual PN 8 2.5197 -0.56 1.2
--.CSI.Z. 2001-07-15T00:14:59.78 10.0 undecidable manual PN 24 2.3421 2.08 0.2
--.ROI.Z. 2001-07-15T00:14:57.23 10.0 undecidable manual PN 31 2.2533 0.69 1.2
--.TDS.Z. 2001-07-15T00:14:56.98 10.0 undecidable manual PN 26 2.2422 0.6 1.2
--.LVI.Z. 2001-07-15T00:14:55.40 10.0 undecidable manual PN 279 2.1423 0.41 1.4
--.ERC.Z. 2001-07-15T00:14:54.35 10.0 undecidable manual PN 281 1.9536 1.91 0.3
--.GIB.Z. 2001-07-15T00:14:49.54 10.0 undecidable manual SG 293 0.8547 0.37 0.7
--.USI.Z. 2001-07-15T00:14:48.77 10.0 undecidable manual PN 306 1.7982 -1.37 0.7
--.GRI.Z. 2001-07-15T00:14:48.80 10.0 undecidable manual PN 42 1.5984 0.66 1.5
--.CZI.Z. 2001-07-15T00:14:48.53 10.0 undecidable manual PN 28 1.7871 -1.49 0.6
--.CSLB.Z. 2001-07-15T00:14:47.40 10.0 undecidable manual SG 290 0.8214 -0.42 0.7
--.CLTB.Z. 2001-07-15T00:14:46.41 10.0 undecidable manual PN 267 1.443 1.2 0.9
--.MPG.Z. 2001-07-15T00:14:45.16 10.0 undecidable manual PN 291 1.4097 0.24 1.8
--.MSI.Z. 2001-07-15T00:14:43.30 10.0 undecidable manual SG 36 0.6882 -0.37 0.7
--.MTTG.Z. 2001-07-15T00:14:41.56 10.0 undecidable manual SG 55 0.6327 -0.32 0.7
--.MEU.Z. 2001-07-15T00:14:39.60 10.0 undecidable manual SG 196 0.555 -0.39 0.7
--.SLNA.Z. 2001-07-15T00:14:36.22 10.0 undecidable manual PG 350 0.9213 -1.16 1
--.GIB.Z. 2001-07-15T00:14:35.72 10.0 undecidable manual PG 293 0.8547 -0.53 1.7
--.AGST.Z. 2001-07-15T00:14:35.84 10.0 undecidable manual SG 158 0.4107 0.92 0.5
--.SOI.Z. 2001-07-15T00:14:35.98 10.0 undecidable manual PG 61 0.9102 -1.18 1
--.SCLL.Z. 2001-07-15T00:14:35.31 10.0 undecidable manual PG 41 0.8103 -0.01 1.9
--.GMB.Z. 2001-07-15T00:14:34.83 10.0 undecidable manual PG 50 0.8103 -0.54 1.6
--.CSLB.Z. 2001-07-15T00:14:34.64 10.0 undecidable manual PG 290 0.8214 -0.83 1.4
--.MSI.Z. 2001-07-15T00:14:33.40 10.0 undecidable manual PG 36 0.6882 -0.03 1.9
--.MTTG.Z. 2001-07-15T00:14:31.60 10.0 undecidable manual PG 55 0.6327 -0.44 1.7
--.MEU.Z. 2001-07-15T00:14:29.22 10.0 undecidable manual PG 196 0.555 -1.42 0.7
--.AGST.Z. 2001-07-15T00:14:27.49 10.0 undecidable manual PG 158 0.4107 -0.53 1.6
--.MNO.Z. 2001-07-15T00:14:25.50 10.0 undecidable manual PG 316 0.3885 -1.81 0.4
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