INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.2 on date 18-03-2017 and time 11:23:04 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km E Norcia (PG), on

  • 18-03-2017 10:23:04 (UTC)
  • 18-03-2017 11:23:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.14 at 13 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 4 4957 4957
Cascia PG 12 3217 8174
Accumoli RI 13 667 8841
Arquata del Tronto AP 13 1178 10019
Castelsantangelo sul Nera MC 13 281 10300
Preci PG 14 724 11024
Cittareale RI 18 482 11506
Montegallo AP 18 523 12029
Visso MC 18 1107 13136
Poggiodomo PG 18 117 13253
Ussita MC 19 444 13697
Cerreto di Spoleto PG 19 1075 14772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SE of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km W of Pescara (121014 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
97 Km W of Chieti (51815 inhabitants)
99 Km SW of Ancona (100861 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 Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Published time (UTC) Author Location ID
Rev 100 2017-03-18
10:23:04
42.78 13.14 ML 1.2 13 2017-03-18
10:42:08
Sala Sismica INGV-Roma 42591801
Best location and best magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-18 10:23:04 ± 0.07
Latitude 42.78 ± 0.00
Longitude 13.14 ± 0.00
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42591801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 319
Semi-minor axis of confidence ellipse (meter) 96
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 130
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.37322
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 42591801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-18 10:42:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2017-03-18T10:23:17.39 0.3 undecidable manual S 114 0.3732 93 -0.17 70
IV.RM33.EHZ. 2017-03-18T10:23:14.63 0.3 undecidable manual S 168 0.2716 95 0.06 72
IV.T1241.EHZ. 2017-03-18T10:23:13.10 0.1 undecidable manual S 69 0.2284 97 -0.18 95
IV.TERO.HHZ. 2017-03-18T10:23:11.76 0.1 undecidable manual P 114 0.3732 93 -0.09 94
IV.MC2.EHZ. 2017-03-18T10:23:11.17 0.1 undecidable manual S 15 0.1403 111 0.42 92
IV.T1217.EHZ. 2017-03-18T10:23:11.38 0.1 undecidable manual S 248 0.1655 104 -0.09 98
IV.MMO1.EHZ. 2017-03-18T10:23:11.94 0.1 undecidable manual S 48 0.1844 101 -0.06 98
IV.T1216.EHZ. 2017-03-18T10:23:10.57 0.6 undecidable manual S 322 0.1457 109 -0.32 46
IV.RM33.EHZ. 2017-03-18T10:23:10.17 0.1 undecidable manual P 168 0.2716 95 0.06 96
IV.T1245.HHZ. 2017-03-18T10:23:09.30 0.6 undecidable manual S 23 0.0881 130 -0.12 49
IV.T1218.EHN. 2017-03-18T10:23:09.84 0.3 undecidable manual S 190 0.107 122 -0.01 75
IV.T1217.EHZ. 2017-03-18T10:23:08.37 0.1 undecidable manual P 248 0.1655 104 0.04 98
IV.T1212.HNZ. 2017-03-18T10:23:08.93 0.1 undecidable manual S 251 0.0737 137 -0.18 97
IV.MMO1.EHZ. 2017-03-18T10:23:08.57 0.1 undecidable manual P 48 0.1844 101 -0.07 98
IV.T1216.EHZ. 2017-03-18T10:23:08.00 0.1 undecidable manual P 322 0.1457 109 0.01 100
IV.T1241.EHZ. 2017-03-18T10:23:08.96 1.0 undecidable manual P 69 0.2284 97 -0.41 23
IV.T1214.EHZ. 2017-03-18T10:23:08.61 0.1 undecidable manual S 107 0.0531 148 -0.12 99
IV.MC2.EHZ. 2017-03-18T10:23:08.03 0.1 undecidable manual P 15 0.1403 111 0.12 98
IV.T1245.HHZ. 2017-03-18T10:23:07.26 0.3 positive manual P 23 0.0881 130 0.12 74
IV.T1218.EHN. 2017-03-18T10:23:07.64 0.1 undecidable manual P 190 0.107 122 0.24 95
IV.T1212.HNZ. 2017-03-18T10:23:07.03 0.1 undecidable manual P 251 0.0737 137 0.06 100
IV.T1214.EHZ. 2017-03-18T10:23:06.90 0.1 undecidable manual P 107 0.0531 148 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1214.EHN. ML:1.1 0.0001525 0.92 AML other m 2017-03-18T10:23:08.44
IV.T1214.EHE. ML:1 0.0001175 0.08 AML other m 2017-03-18T10:23:08.96
IV.T1245.HHE. ML:1.2 0.000162 0.18 AML other m 2017-03-18T10:23:09.60
IV.T1245.HNE. ML:1.2 0.000196 0.66 AML other m 2017-03-18T10:23:09.69
IV.T1245.HHN. ML:1.3 0.000213 1.44 AML other m 2017-03-18T10:23:10.88
IV.T1245.HNN. ML:1.5 0.0003255 1.44 AML other m 2017-03-18T10:23:10.88
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