Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-03-2020 and time 11:15:39 (Italy) in region 3 km NE Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km NE Norcia (PG), on

  • 18-03-2020 10:15:39 (UTC)
  • 18-03-2020 11:15:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8180, 13.1130 at 11 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
Norcia PG 3 4957 4957
Preci PG 9 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 13 1107 7069
Cascia PG 14 3217 10286
Ussita MC 14 444 10730
Cerreto di Spoleto PG 16 1075 11805
Arquata del Tronto AP 16 1178 12983
Sellano PG 17 1079 14062
Accumoli RI 18 667 14729
Montegallo AP 18 523 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 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
Bulletin
Rev1000 		ML 1.4 2020-03-18
10:15:39		 42.8182 13.1127 11 2020-07-18
21:08:27		 Bollettino Sismico Italiano INGV 77467991
Reviewed
Rev100 		ML 1.4 2020-03-18
10:15:39		 42.8177 13.1153 11 2020-03-18
10:23:36		 Sala Sismica INGV-Roma 77344451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-18 10:15:39 ± 0.05
Latitude 42.8182 ± 0.0027
Longitude 13.1127 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77467991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 360
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.01529
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 77344451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-18 10:23:36

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 77467991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-22 13:06:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-03-18T10:15:54.00 0.6 undecidable manual S 118 45.5211 90 0.03 46
IV.CSP1.EHZ. 2020-03-18T10:15:50.45 0.6 undecidable manual S 14 31.2465 90 0.28 45
IV.SMA1.EHZ. 2020-03-18T10:15:49.12 0.6 undecidable manual S 139 27.6501 90 -0.06 48
IV.CESI.HHZ. 2020-03-18T10:15:48.87 0.6 undecidable manual S 321 26.751 90 -0.08 47
IV.MTRA.HNZ. 2020-03-18T10:15:48.36 0.6 undecidable manual S 106 24.0537 90 0.11 47
IV.FDMO.HHZ. 2020-03-18T10:15:48.24 0.3 undecidable manual S 355 24.3534 90 -0.07 71
IV.LNSS.HHZ. 2020-03-18T10:15:48.40 0.3 undecidable manual S 194 24.5532 90 0.02 73
IT.MTCL.HGZ. 2020-03-18T10:15:47.27 0.6 undecidable manual S 335 21.5673 90 -0.3 45
IV.TERO.HHZ. 2020-03-18T10:15:47.69 0.3 undecidable manual P 118 45.5211 90 -0.1 69
IV.MOMA.HHZ. 2020-03-18T10:15:47.96 0.1 undecidable manual P 268 44.2224 90 0.37 87
IV.FEMA.HNZ. 2020-03-18T10:15:46.10 0.6 undecidable manual S 342 16.7721 90 -0.19 47
IV.MMO1.EHZ. 2020-03-18T10:15:46.91 0.3 undecidable manual S 63 19.5693 90 -0.14 71
IV.MC2.EHZ. 2020-03-18T10:15:45.46 0.3 undecidable manual S 31 12.0768 107 0.41 67
IV.SMA1.EHZ. 2020-03-18T10:15:45.01 0.1 undecidable manual P 139 27.6501 90 -0.02 96
IV.CSP1.EHZ. 2020-03-18T10:15:45.70 0.1 undecidable manual P 14 31.2465 90 0.1 94
IV.LNSS.HHZ. 2020-03-18T10:15:44.61 0.1 undecidable manual P 194 24.5532 90 0.04 96
IV.CESI.HHZ. 2020-03-18T10:15:44.85 0.1 undecidable manual P 321 26.751 90 -0.05 95
IV.MTRA.HNZ. 2020-03-18T10:15:44.34 0.1 undecidable manual P 106 24.0537 90 -0.15 94
IV.FDMO.HHZ. 2020-03-18T10:15:44.50 0.1 undecidable manual P 355 24.3534 90 -0.03 96
IV.MMO1.EHZ. 2020-03-18T10:15:43.73 0.1 undecidable manual P 63 19.5693 90 -0.07 96
IT.MTCL.HGZ. 2020-03-18T10:15:43.99 0.1 undecidable manual P 335 21.5673 90 -0.11 95
IV.FEMA.HNZ. 2020-03-18T10:15:43.42 0.3 undecidable manual P 342 16.7721 90 0.06 73
IV.NRCA.HNZ. 2020-03-18T10:15:42.89 0.3 undecidable manual S 5 1.6983 169 -0.37 71
IV.MC2.EHZ. 2020-03-18T10:15:42.83 0.1 undecidable manual P 31 12.0768 107 0.19 95
IV.NRCA.HNZ. 2020-03-18T10:15:41.60 0.1 undecidable manual P 5 1.6983 169 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.0005339236 0.0576 AML other m 2020-03-18T10:15:42.91
IV.NRCA.HHN. ML:1.8 0.00115487835 0.1408 AML other m 2020-03-18T10:15:42.97
IV.NRCA.HNN. ML:1.8 0.00108020515 0.1344 AML other m 2020-03-18T10:15:42.97
IV.NRCA.HNE. ML:1.5 0.00054221395 0.0704 AML other m 2020-03-18T10:15:43.23
IV.LNSS.HHN. ML:1.2 0.000104697245 1.68 AML other m 2020-03-18T10:15:48.92
IV.FDMO.HHE. ML:0.9 0.000049490455 1.8016 AML other m 2020-03-18T10:15:48.93
IV.LNSS.HHE. ML:1.2 0.000097932875 1.8784 AML other m 2020-03-18T10:15:48.04
IV.FDMO.HHN. ML:0.9 0.000049690424999999996 0.16 AML other m 2020-03-18T10:15:49.17
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