Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.9 on date 18-02-2018 and time 03:58:02 (Italy) in region 4 km S Blufi (PA)

A magnitude ML 2.9 earthquake occured in region: 4 km S Blufi (PA), on

  • 18-02-2018 02:58:02 (UTC)
  • 18-02-2018 03:58:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7220, 14.0710 at 34 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
Blufi PA 4 1029 1029
Bompietro PA 4 1401 2430
Alimena PA 5 2032 4462
Resuttano CL 6 2038 6500
Castellana Sicula PA 7 3411 9911
Petralia Soprana PA 9 3360 13271
Petralia Sottana PA 10 2821 16092
Polizzi Generosa PA 12 3407 19499
Santa Caterina Villarmosa CL 15 5388 24887
Gangi PA 15 6811 31698
Geraci Siculo PA 17 1945 33643
Villarosa EN 17 4937 38580
Marianopoli CL 19 1906 40486
Caltavuturo PA 19 4017 44503

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Caltanissetta (63360 inhabitants)
63 Km NE of Agrigento (59770 inhabitants)
63 Km SE of Bagheria (55387 inhabitants)
75 Km N of Gela (75827 inhabitants)
76 Km SE of Palermo (674435 inhabitants)
93 Km W of Catania (314555 inhabitants)
95 Km NW of Vittoria (63339 inhabitants)
97 Km W of Acireale (52622 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 		ML 2.9 2018-02-18
02:58:02		 37.7217 14.0707 34 2019-04-24
14:49:44		 Bollettino Sismico Italiano INGV 61672351
Reviewed
Rev100 		ML 2.9 2018-02-18
02:58:03		 37.7038 14.0473 29 2018-02-18
03:06:59		 Sala Sismica INGV-Roma 53988681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-02-18 02:58:02 ± 0.09
Latitude 37.7217 ± 0.0081
Longitude 14.0707 ± 0.0091
Depth (km) 34 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 61672351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1022
Semi-minor axis of confidence ellipse (meter) 495
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 1.31571
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:2.9

Field Value
Value 2.9
Uncertainty 0.3
Num. used stations 64
Type of magnitude ML
Reference to an origin 61672351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-10-06 16:03:03

ML:2.9

Field Value
Value 2.9
Uncertainty 0.3
Num. used stations 76
Type of magnitude ML
Reference to an origin 53988681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-02-18 03:06:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGST.EHZ. 2018-02-18T02:58:35.50 0.6 undecidable manual S 117 114.0969 54 0.34 40
IV.IVPL.HHZ. 2018-02-18T02:58:34.50 0.6 undecidable manual S 47 107.6145 54 0.73 35
IV.SSY.HHZ. 2018-02-18T02:58:34.80 0.6 undecidable manual S 125 108.2139 54 0.9 33
IV.HAGA.HHZ. 2018-02-18T02:58:33.80 0.3 undecidable manual S 117 107.0151 54 0.17 63
IV.HMDC.HHZ. 2018-02-18T02:58:33.60 0.3 undecidable manual S 143 105.4167 54 0.32 62
IV.HVZN.HHE. 2018-02-18T02:58:28.80 0.3 undecidable manual S 137 82.8504 108 0.49 63
IV.HLNI.HHZ. 2018-02-18T02:58:27.50 0.3 undecidable manual S 120 81.7515 108 -0.54 62
IV.MTTG.HHZ. 2018-02-18T02:58:26.06 0.3 undecidable manual P 77 146.0427 54 0.62 52
IV.HPAC.HHZ. 2018-02-18T02:58:25.11 0.1 undecidable manual P 142 141.1476 54 0.28 77
IV.MARS.EHZ. 2018-02-18T02:58:24.10 0.1 undecidable manual P 272 132.1677 54 0.39 77
IV.MSRU.HHZ. 2018-02-18T02:58:24.97 0.6 undecidable manual P 64 139.3605 54 0.37 38
IV.ERC.EHN. 2018-02-18T02:58:24.74 0.1 undecidable manual P 286 134.5653 54 0.73 69
IV.MPNC.HHN. 2018-02-18T02:58:23.25 0.1 undecidable manual P 67 121.6893 54 0.84 66
IV.SOLUN.HHZ. 2018-02-18T02:58:23.50 0.3 undecidable manual S 311 62.493 114 0.25 69
IV.RAFF.HHZ. 2018-02-18T02:58:23.58 0.6 undecidable manual S 155 60.9945 115 0.69 41
IV.MSFR.HHZ. 2018-02-18T02:58:22.04 0.6 undecidable manual S 53 57.2982 116 0.06 48
IV.USI.HHZ. 2018-02-18T02:58:22.61 0.3 undecidable manual P 325 134.1657 54 -1.35 38
IV.MILZ.HHZ. 2018-02-18T02:58:21.79 0.6 undecidable manual P 59 118.3926 54 -0.2 42
IV.CAVT.HHE. 2018-02-18T02:58:21.61 0.6 undecidable manual P 268 115.4955 54 -0.03 43
IV.AIO.HHZ. 2018-02-18T02:58:20.82 0.1 undecidable manual P 74 105.5166 54 0.43 80
IV.NOV.HHZ. 2018-02-18T02:58:20.30 0.1 undecidable manual P 70 99.3228 54 0.68 74
IV.IVPL.HHZ. 2018-02-18T02:58:20.05 0.1 undecidable manual P 47 107.6145 54 -0.61 77
IV.AGST.EHZ. 2018-02-18T02:58:20.79 0.1 undecidable manual P 117 114.0969 54 -0.68 74
IV.SSY.HHZ. 2018-02-18T02:58:20.23 0.1 undecidable manual P 125 108.2139 54 -0.5 79
IV.ILLI.HHZ. 2018-02-18T02:58:20.57 0.1 undecidable manual P 43 111 54 -0.51 79
IV.EPOZ.HHZ. 2018-02-18T02:58:19.89 0.1 undecidable manual P 93 98.2239 54 0.4 82
IV.MMGO.HHZ. 2018-02-18T02:58:19.14 0.1 undecidable manual P 266 96.2259 54 -0.1 88
IV.CRJA.HHZ. 2018-02-18T02:58:19.77 0.6 undecidable manual P 276 93.9393 54 0.81 36
IV.HAGA.HHZ. 2018-02-18T02:58:19.86 0.1 undecidable manual P 117 107.0151 54 -0.72 73
IV.IVGP.HHZ. 2018-02-18T02:58:19.92 0.1 undecidable manual P 46 107.9142 54 -0.78 72
IV.HMDC.HHZ. 2018-02-18T02:58:19.85 0.1 undecidable manual P 143 105.4167 54 -0.53 79
IV.MUCR.HHZ. 2018-02-18T02:58:17.14 0.1 undecidable manual P 63 78.8655 109 0.21 89
IV.MPG.SHZ. 2018-02-18T02:58:16.52 0.6 undecidable manual P 308 79.0653 109 -0.44 42
IV.GIB.HHZ. 2018-02-18T02:58:16.30 0.6 undecidable manual S 353 30.0477 135 0.27 48
IV.HLNI.HHZ. 2018-02-18T02:58:16.36 0.1 undecidable manual P 120 81.7515 108 -0.99 68
IV.PLLN.EHZ. 2018-02-18T02:58:16.80 0.6 undecidable manual S 12 30.747 135 0.65 44
IV.HVZN.HHE. 2018-02-18T02:58:16.86 0.1 undecidable manual P 137 82.8504 108 -0.65 79
IV.ALJA.HHZ. 2018-02-18T02:58:16.50 0.3 undecidable manual S 276 27.9498 138 0.86 61
IV.CSLB.HHZ. 2018-02-18T02:58:15.10 0.6 undecidable manual S 357 23.9538 142 0.14 50
IV.CORL.HHZ. 2018-02-18T02:58:15.62 0.1 undecidable manual P 286 69.8745 112 -0.01 94
IV.RAFF.HHZ. 2018-02-18T02:58:14.26 0.1 undecidable manual P 155 60.9945 115 -0.12 94
IV.SOLUN.HHZ. 2018-02-18T02:58:14.15 0.1 negative manual P 311 62.493 114 -0.43 87
IV.PETRA.HHZ. 2018-02-18T02:58:14.10 0.3 undecidable manual S 17 12.9759 158 0.63 68
IV.MSFR.HHZ. 2018-02-18T02:58:13.91 0.1 positive manual P 53 57.2982 116 0.05 96
IV.GALF.HHZ. 2018-02-18T02:58:12.76 0.3 negative manual P 91 43.5231 124 0.74 61
IV.PLLN.EHZ. 2018-02-18T02:58:10.18 0.1 positive manual P 12 30.747 135 -0.31 95
IV.ALJA.HHZ. 2018-02-18T02:58:10.12 0.1 positive manual P 276 27.9498 138 -0.08 100
IV.GIB.HHZ. 2018-02-18T02:58:10.19 0.1 positive manual P 353 30.0477 135 -0.22 97
IV.CSLB.HHZ. 2018-02-18T02:58:09.34 0.1 positive manual P 357 23.9538 142 -0.46 93
IV.PETRA.HHZ. 2018-02-18T02:58:08.69 0.1 positive manual P 17 12.9759 158 -0.25 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:3.4 0.01008 0.46 AML other m 2018-02-18T02:58:15.04
IV.CSLB.HHN. ML:2.7 0.0016095880000000001 0.48 AML other m 2018-02-18T02:58:15.36
IV.CSLB.HHE. ML:2.9 0.0025350855 0.56 AML other m 2018-02-18T02:58:15.68
IV.GIB.HHE. ML:3.2 0.005241948000000001 0.64 AML other m 2018-02-18T02:58:17.33
IV.PLLN.EHE. ML:3.3 0.006775000000000001 0.74 AML other m 2018-02-18T02:58:17.99
IV.ALJA.HHE. ML:3.0 0.0033936875000000004 0.52 AML other m 2018-02-18T02:58:18.04
IV.PLLN.EHN. ML:3.4 0.007185 0.44 AML other m 2018-02-18T02:58:18.37
IV.GIB.HHN. ML:3.2 0.004796805499999999 0.5392 AML other m 2018-02-18T02:58:19.82
IV.ALJA.HHN. ML:3.0 0.0028142515 0.4192 AML other m 2018-02-18T02:58:20.55
IV.PETRA.HHN. ML:3.1 0.00574 0.5 AML other m 2018-02-18T02:58:21.48
IV.SOLUN.HHE. ML:2.8 0.00102941055 0.52 AML other m 2018-02-18T02:58:24.11
IV.SOLUN.HHN. ML:2.5 0.0005698947999999999 0.6 AML other m 2018-02-18T02:58:24.81
IV.MSFR.HHN. ML:2.4 0.0003996712 1.08 AML other m 2018-02-18T02:58:24.93
IV.RAFF.HHN. ML:2.9 0.0014449999999999999 0.3 AML other m 2018-02-18T02:58:25.62
IV.GALF.HHE. ML:2.7 0.0011949999999999999 1 AML other m 2018-02-18T02:58:26.49
IV.RAFF.HHE. ML:2.9 0.001435 0.3 AML other m 2018-02-18T02:58:26.70
IV.HLNI.HHN. ML:3.0 0.001240369 0.1808 AML other m 2018-02-18T02:58:28.04
IV.HLNI.HHE. ML:2.8 0.00086837025 0.24 AML other m 2018-02-18T02:58:28.72
IV.MSFR.HHE. ML:2.3 0.0003395 0.48 AML other m 2018-02-18T02:58:28.54
IV.ESML.HHE. ML:2.8 0.0009865 1.38 AML other m 2018-02-18T02:58:29.02
IV.MPG.SHN. ML:0.0 0.00027749999999999997 0.32 AML other m 2018-02-18T02:58:29.71
IV.ESML.HHN. ML:2.8 0.0008681514 0.2192 AML other m 2018-02-18T02:58:29.76
IV.CORL.HHN. ML:3.1 0.0020350000000000004 0.62 AML other m 2018-02-18T02:58:30.83
IV.CORL.HHE. ML:3.2 0.002185 0.82 AML other m 2018-02-18T02:58:31.84
IV.GALF.HHN. ML:2.6 0.000977 0.5 AML other m 2018-02-18T02:58:31.73
IV.MUCR.HHE. ML:2.9 0.0009765858 0.5184 AML other m 2018-02-18T02:58:32.63
IV.MUCR.HHN. ML:2.8 0.0008502716 0.44 AML other m 2018-02-18T02:58:32.80
IV.EMSG.HHN. ML:3.0 0.0012850000000000001 1.12 AML other m 2018-02-18T02:58:32.17
IV.MPG.SHE. ML:0.0 0.00027245895000000005 0.8 AML other m 2018-02-18T02:58:32.89
IV.HAGA.HHN. ML:3.2 0.001373539 0.44 AML other m 2018-02-18T02:58:34.26
IV.HAGA.HHE. ML:3.4 0.0022771265 0.4192 AML other m 2018-02-18T02:58:34.39
IV.HMDC.HHE. ML:3.6 0.003109821 0.2592 AML other m 2018-02-18T02:58:34.47
IV.HMDC.HHN. ML:3.7 0.0039608795 0.32 AML other m 2018-02-18T02:58:34.54
IV.NOV.HHE. ML:2.9 0.0007514674500000001 0.3408 AML other m 2018-02-18T02:58:35.03
IV.SSY.HHE. ML:3.6 0.00323 1.04 AML other m 2018-02-18T02:58:35.20
IV.EPOZ.HHN. ML:3.4 0.002575 0.68 AML other m 2018-02-18T02:58:35.81
IV.EPZF.HHN. ML:2.9 0.00128 0.48 AML other m 2018-02-18T02:58:35.63
IV.AGST.EHE. ML:3.8 0.005404008 0.1792 AML other m 2018-02-18T02:58:35.98
IV.AGST.EHN. ML:3.8 0.0044193355 0.1792 AML other m 2018-02-18T02:58:35.98
IV.CRJA.HHE. ML:3.1 0.0013288705 0.8 AML other m 2018-02-18T02:58:37.12
IV.EMSG.HHE. ML:3.1 0.00165 1.12 AML other m 2018-02-18T02:58:37.94
IV.SSY.HHN. ML:3.7 0.0037800000000000004 0.26 AML other m 2018-02-18T02:58:37.71
IV.MMGO.HHN. ML:2.3 0.000187 1.16 AML other m 2018-02-18T02:58:38.00
IV.NOV.HHN. ML:2.7 0.0004354441 0.36 AML other m 2018-02-18T02:58:38.32
IV.IVPL.HHE. ML:2.8 0.00059740335 0.32 AML other m 2018-02-18T02:58:38.74
IV.EPOZ.HHE. ML:3.0 0.0009390000000000001 0.76 AML other m 2018-02-18T02:58:38.59
IV.IVGP.HHN. ML:2.4 0.000225 1.44 AML other m 2018-02-18T02:58:39.08
IV.CRJA.HHN. ML:2.6 0.00042909425 0.5984 AML other m 2018-02-18T02:58:39.23
IV.EPZF.HHE. ML:2.8 0.0009637 0.6 AML other m 2018-02-18T02:58:38.96
IV.ILLI.HHN. ML:3.4 0.0019219075 0.3392 AML other m 2018-02-18T02:58:40.08
IV.USI.HHN. ML:3.0 0.0006535 1.42 AML other m 2018-02-18T02:58:39.25
IV.ILLI.HHE. ML:3.4 0.001765 0.84 AML other m 2018-02-18T02:58:40.43
IV.AIO.HHE. ML:2.7 0.0003845 0.98 AML other m 2018-02-18T02:58:41.71
IV.AIO.HHN. ML:2.8 0.00049 0.4 AML other m 2018-02-18T02:58:42.30
IV.IVPL.HHN. ML:2.9 0.0006552474499999999 0.4784 AML other m 2018-02-18T02:58:42.79
IV.HPAC.HHE. ML:3.5 0.001788462 0.24 AML other m 2018-02-18T02:58:44.47
IV.IVGP.HHE. ML:2.5 0.00027436375 0.68 AML other m 2018-02-18T02:58:45.44
IV.MILZ.HHN. ML:2.6 0.0002655 0.48 AML other m 2018-02-18T02:58:47.62
IV.MSRU.HHN. ML:2.7 0.00029008595000000004 0.5216 AML other m 2018-02-18T02:58:47.80
IV.MILZ.HHE. ML:2.7 0.000375 0.56 AML other m 2018-02-18T02:58:48.11
IV.HPAC.HHN. ML:3.4 0.0015426655 0.6208 AML other m 2018-02-18T02:58:49.63
IV.MSRU.HHE. ML:2.8 0.00038442260000000003 0.48 AML other m 2018-02-18T02:58:50.01
IV.MARS.EHN. ML:2.7 0.00028639295 0.8608 AML other m 2018-02-18T02:58:51.71
IV.MARS.EHE. ML:2.8 0.00039 1.2 AML other m 2018-02-18T02:58:53.66
IV.MTTG.HHN. ML:2.5 0.00016553225 0.48 AML other m 2018-02-18T02:58:59.40
IV.MTTG.HHE. ML:2.6 0.00019618965 0.84 AML other m 2018-02-18T02:58:59.56
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
Waveforms Seismic signals in miniseed + resp format Download