Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 21-02-2018 and time 18:16:56 (Italy) in region 1 km SE Preci (PG)

A magnitude ML 2.0 earthquake occured in region: 1 km SE Preci (PG), on

  • 21-02-2018 17:16:56 (UTC)
  • 21-02-2018 18:16:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8740, 13.0470 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Preci PG 1 724 724
Visso MC 7 1107 1831
Castelsantangelo sul Nera MC 9 281 2112
Norcia PG 10 4957 7069
Sellano PG 10 1079 8148
Ussita MC 11 444 8592
Cerreto di Spoleto PG 12 1075 9667
Monte Cavallo MC 14 145 9812
Cascia PG 17 3217 13029
Fiordimonte MC 19 202 13231
Vallo di Nera PG 19 364 13595
Pieve Torina MC 19 1458 15053
Bolognola MC 20 142 15195

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
59 Km W of Teramo (54892 inhabitants)
60 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 2.0 2018-02-21
17:16:56		 42.8742 13.0472 11 2018-02-21
17:20:37		 Sala Sismica INGV-Roma 54068351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-02-21 17:16:56 ± 0.05
Latitude 42.8742 ± 0.0027
Longitude 13.0472 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 54068351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28239
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 8
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 54068351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-02-21 17:20:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2018-02-21T17:17:07.44 0.1 undecidable manual S 48 31.3464 50 0.32 91
IV.LNSS.HHZ. 2018-02-21T17:17:06.91 0.1 undecidable manual S 181 30.0477 50 0.14 95
IV.TERO.HHZ. 2018-02-21T17:17:05.62 3.0 negative manual P -0.5 0
IV.EL6.EHZ. 2018-02-21T17:17:05.50 3.0 undecidable manual P -0.17 0
IV.CSP1.EHZ. 2018-02-21T17:17:05.80 0.1 undecidable manual S 28 27.3504 50 -0.24 93
IV.RM33.EHZ. 2018-02-21T17:17:04.19 3.0 negative manual P -0.19 0
IV.ARRO.EHZ. 2018-02-21T17:17:04.11 3.0 negative manual P 0.16 0
IV.SNTG.HHZ. 2018-02-21T17:17:04.50 3.0 undecidable manual P 0.08 0
IV.ASSB.HHZ. 2018-02-21T17:17:03.15 3.0 positive manual P -0.25 0
IV.T1221.EHZ. 2018-02-21T17:17:03.09 0.1 undecidable manual S 265 16.3725 123 0.09 98
IV.MF5.EHZ. 2018-02-21T17:17:03.45 3.0 positive manual P 0.24 0
IV.T1214.EHZ. 2018-02-21T17:17:03.36 0.1 undecidable manual S 134 18.2706 120 -0.22 95
IV.SMA1.EHZ. 2018-02-21T17:17:03.17 3.0 negative manual P -0.06 0
IV.CESI.HHZ. 2018-02-21T17:17:03.53 0.1 undecidable manual S 321 18.5703 120 -0.13 97
IV.MOMA.HHZ. 2018-02-21T17:17:03.96 3.0 negative manual P 0.06 0
IV.MC2.EHZ. 2018-02-21T17:17:02.03 0.1 undecidable manual S 70 12.2766 131 0.16 97
IV.GUMA.HHZ. 2018-02-21T17:17:02.59 0.1 undecidable manual P 48 31.3464 50 0.08 96
IV.PF6.EHZ. 2018-02-21T17:17:02.24 3.0 undecidable manual P -0.27 0
IV.T1299.EHZ. 2018-02-21T17:17:02.85 3.0 positive manual P 0.11 0
IV.LNSS.HHZ. 2018-02-21T17:17:02.18 0.1 undecidable manual P 181 30.0477 50 -0.13 95
IV.CSP1.EHZ. 2018-02-21T17:17:01.64 0.1 undecidable manual P 28 27.3504 50 -0.25 93
OB.GAVE.EHZ. 2018-02-21T17:17:01.39 3.0 positive manual Pg 0.08 0
IV.CESI.HHZ. 2018-02-21T17:17:00.50 0.1 positive manual P 321 18.5703 120 -0.01 99
IV.T1221.EHZ. 2018-02-21T17:17:00.27 0.1 positive manual P 265 16.3725 123 0.14 97
IV.NRCA.HNZ. 2018-02-21T17:17:00.60 0.1 undecidable manual S 129 7.0929 147 -0.08 100
IV.T1214.EHZ. 2018-02-21T17:17:00.42 0.1 negative manual P 134 18.2706 120 -0.04 99
IV.MC2.EHZ. 2018-02-21T17:16:59.63 0.1 positive manual P 70 12.2766 131 0.15 97
IV.NRCA.HNZ. 2018-02-21T17:16:58.86 0.1 undecidable manual P 129 7.0929 147 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.4 0.00342 0.08 AML other m 2018-02-21T17:17:00.67
IV.NRCA.HNN. ML:2.4 0.003215 0.08 AML other m 2018-02-21T17:17:00.68
IV.NRCA.HNE. ML:2.5 0.00415 1.22 AML other m 2018-02-21T17:17:00.15
IV.NRCA.HHE. ML:2.5 0.004325 1.22 AML other m 2018-02-21T17:17:00.15
IV.T1221.EHE. ML:1.9 0.0007775000000000001 0.48 AML other m 2018-02-21T17:17:03.39
IV.T1221.HNE. ML:2.0 0.0008125 0.48 AML other m 2018-02-21T17:17:03.39
IV.T1221.HNN. ML:1.8 0.0005625 0.18 AML other m 2018-02-21T17:17:03.15
IV.T1221.EHN. ML:1.8 0.0005629999999999999 0.18 AML other m 2018-02-21T17:17:03.15
IV.CESI.HHN. ML:2.2 0.001188 0.3 AML other m 2018-02-21T17:17:03.96
IV.T1214.EHE. ML:2.2 0.0012029999999999999 0.92 AML other m 2018-02-21T17:17:03.86
IV.T1214.HNE. ML:2.2 0.001265 1.62 AML other m 2018-02-21T17:17:03.86
IV.T1214.HNN. ML:2.2 0.00117 1.54 AML other m 2018-02-21T17:17:03.90
IV.T1214.EHN. ML:2.2 0.0011099999999999999 0.6 AML other m 2018-02-21T17:17:03.91
IV.CESI.HHE. ML:1.9 0.00064 1.1 AML other m 2018-02-21T17:17:04.15
OB.GAVE.HNN. ML:1.9 0.000486 0.24 AML other m 2018-02-21T17:17:05.31
OB.GAVE.EHN. ML:2.3 0.00132 0.24 AML other m 2018-02-21T17:17:05.31
OB.GAVE.HNE. ML:2.4 0.00152 0.56 AML other m 2018-02-21T17:17:05.30
OB.GAVE.EHE. ML:2.4 0.0016099999999999999 0.56 AML other m 2018-02-21T17:17:05.30
IV.CSP1.EHN. ML:1.1 0.00005915 0.7 AML other m 2018-02-21T17:17:06.87
IV.CSP1.EHE. ML:1.6 0.0001875 0.56 AML other m 2018-02-21T17:17:07.07
IV.LNSS.HHE. ML:2.0 0.0004235 0.54 AML other m 2018-02-21T17:17:07.33
IV.LNSS.HHN. ML:1.9 0.00038 0.12 AML other m 2018-02-21T17:17:07.55
IV.ASSB.HHE. ML:1.9 0.0003265 0.12 AML other m 2018-02-21T17:17:08.78
IV.ASSB.HHN. ML:1.8 0.00023549999999999998 0.66 AML other m 2018-02-21T17:17:09.07
IV.ARRO.EHE. ML:1.6 0.0001285 0.18 AML other m 2018-02-21T17:17:09.66
IV.MOMA.HHE. ML:1.9 0.0002515 0.14 AML other m 2018-02-21T17:17:10.71
IV.ARRO.EHN. ML:1.6 0.000128 0.18 AML other m 2018-02-21T17:17:11.19
IV.MOMA.HHN. ML:1.8 0.00021200000000000003 0.72 AML other m 2018-02-21T17:17:11.53
IV.SMA1.EHE. ML:1.8 0.000236 1.56 AML other m 2018-02-21T17:17:12.05
IV.SMA1.EHN. ML:1.8 0.0002475 0.44 AML other m 2018-02-21T17:17:12.63
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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