ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.3 on date 17-03-2019 and time 22:20:59 (UTC) in region Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: Norcia (PG), on

  • 17-03-2019 22:20:59 (UTC)
  • 17-03-2019 23:20:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.09 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.

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 0 4957 4957
Cascia PG 10 3217 8174
Preci PG 11 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 16 117 10371
Visso MC 16 1107 11478
Accumoli RI 16 667 12145
Arquata del Tronto AP 17 1178 13323
Sellano PG 18 1079 14402
Ussita MC 18 444 14846
Vallo di Nera PG 19 364 15210
Monteleone di Spoleto PG 19 599 15809
Cittareale RI 20 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
99 Km W of Pescara (121014 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.3 2019-03-17
22:20:59
42.79 13.09 11 2019-03-17
22:49:45
Sala Sismica INGV-Roma 66648191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-17 22:20:59 ± 0.07
Latitude 42.79 ± 0.00
Longitude 13.09 ± 0.01
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 66648191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 571
Semi-minor axis of confidence ellipse (meter) 385
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.25631
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 66648191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-17 22:49:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2019-03-17T22:21:09.55 0.6 undecidable manual S 327 0.2563 50 -0.03 48
IV.MMO1.EHZ. 2019-03-17T22:21:07.89 0.6 undecidable manual S 57 0.2032 50 -0.11 48
IV.LNSS.HHE. 2019-03-17T22:21:07.54 0.6 undecidable manual S 192 0.1907 50 -0.09 48
IV.T1299.EHE. 2019-03-17T22:21:07.76 0.6 undecidable manual S 138 0.2077 50 -0.38 45
IV.MC2.EHE. 2019-03-17T22:21:06.28 0.6 undecidable manual S 30 0.1403 125 0.24 47
IV.CESI.HHZ. 2019-03-17T22:21:05.29 0.1 undecidable manual P 327 0.2563 50 -0.01 97
IV.SMA1.EHZ. 2019-03-17T22:21:05.06 0.1 undecidable manual P 132 0.2383 50 0.07 96
IV.T1299.EHE. 2019-03-17T22:21:04.73 0.1 undecidable manual P 138 0.2077 50 0.25 93
IV.MMO1.EHZ. 2019-03-17T22:21:04.34 0.1 undecidable manual P 57 0.2032 50 -0.05 98
IV.LNSS.HHE. 2019-03-17T22:21:04.20 0.1 undecidable manual P 192 0.1907 50 0.03 98
IV.NRCA.HHZ. 2019-03-17T22:21:03.30 0.3 undecidable manual S 19 0.0468 154 -0.31 71
IV.MC2.EHE. 2019-03-17T22:21:03.31 0.3 undecidable manual P 30 0.1403 125 0.05 74
IV.NRCA.HHZ. 2019-03-17T22:21:01.93 0.1 undecidable manual P 19 0.0468 154 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.0002735 0.14 AML other m 2019-03-17T22:21:03.48
IV.NRCA.HNE. ML:1.2 0.0002567328 0.0768 AML other m 2019-03-17T22:21:03.35
IV.NRCA.HNN. ML:1.4 0.00036423025 0.1536 AML other m 2019-03-17T22:21:03.38
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download