Earthquake with magnitude of ML 0.8 on date 04-03-2017 and time 22:13:31 (Italy) in region 4 km SE Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km SE Norcia (PG), on

  • 04-03-2017 21:13:31 (UTC)
  • 04-03-2017 22:13:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.77, 13.14 at 10 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 5 4957 4957
Cascia PG 12 3217 8174
Accumoli RI 12 667 8841
Arquata del Tronto AP 13 1178 10019
Castelsantangelo sul Nera MC 14 281 10300
Preci PG 15 724 11024
Cittareale RI 17 482 11506
Poggiodomo PG 18 117 11623
Montegallo AP 18 523 12146
Visso MC 19 1107 13253
Cerreto di Spoleto PG 19 1075 14328
Ussita MC 20 444 14772
Amatrice RI 20 2657 17429
Monteleone di Spoleto PG 20 599 18028

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SE of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 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 Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.8 2017-03-04
21:13:31
42.77 13.14 10 2017-03-04
21:24:33
Sala Sismica INGV-Roma 41972531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-04 21:13:31 ± 0.11
Latitude 42.77 ± 0.00
Longitude 13.14 ± 0.00
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 41972531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 279
Semi-minor axis of confidence ellipse (meter) 113
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.14929
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 41972531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-04 21:24:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FVI.HHZ. 2017-03-04T21:15:42.91 3.0 undecidable manual Sg 12.92 0
IV.GROG.HHZ. 2017-03-04T21:15:01.28 3.0 undecidable manual Sg 5.79 0
GU.GRAM.HHZ. 2017-03-04T21:14:58.77 3.0 undecidable manual Sn -9.54 0
AC.VLO.HHZ. 2017-03-04T21:14:51.57 3.0 undecidable manual Sn -7.86 0
IV.CRJA.HHZ. 2017-03-04T21:14:50.79 3.0 undecidable manual Sn -3.35 0
IV.EUCT.HNZ. 2017-03-04T21:14:41.26 3.0 undecidable manual Pg 12.42 0
IV.IST3.HHZ. 2017-03-04T21:14:35.97 3.0 undecidable manual Sg 7.76 0
AC.VLO.HHZ. 2017-03-04T21:14:21.41 3.0 positive manual Pg 10.88 0
IV.ERC.EHZ. 2017-03-04T21:14:17.90 3.0 undecidable manual Pg 11.98 0
IV.GROG.HHZ. 2017-03-04T21:14:07.52 3.0 undecidable manual Pn -0.8 0
IV.NDIM.HNZ. 2017-03-04T21:14:06.79 3.0 negative manual Pn -7.2 0
IV.CSP1.EHZ. 2017-03-04T21:14:05.65 3.0 undecidable manual Sg -0.88 0
IV.RM33.EHZ. 2017-03-04T21:13:53.37 3.0 undecidable manual Sg -1.18 0
IV.T1256.HNZ. 2017-03-04T21:13:40.00 3.0 undecidable manual Pg 0.32 0
IV.SRES.HHZ. 2017-03-04T21:13:38.06 3.0 negative manual Pg 0.79 0
IV.MC2.EHZ. 2017-03-04T21:13:38.13 0.3 undecidable manual S 15 0.1475 121 0.12 73
IV.T1216.EHZ. 2017-03-04T21:13:37.98 0.3 undecidable manual S 325 0.1493 121 -0.11 73
IV.T1218.EHZ. 2017-03-04T21:13:36.47 0.1 undecidable manual S 189 0.1007 132 -0.09 98
IV.T1212.EHZ. 2017-03-04T21:13:35.85 0.1 undecidable manual S 256 0.0701 142 0.1 99
IV.MC2.EHZ. 2017-03-04T21:13:35.31 0.3 undecidable manual P 15 0.1475 121 0.1 73
IV.T1216.EHZ. 2017-03-04T21:13:35.12 0.1 undecidable manual P 325 0.1493 121 -0.14 96
IV.T1214.EHZ. 2017-03-04T21:13:35.34 0.1 undecidable manual S 100 0.0531 149 -0.04 100
IV.T1241.EHZ. 2017-03-04T21:13:34.75 3.0 undecidable manual Pg -2.14 0
IV.T1245.HHZ. 2017-03-04T21:13:34.27 0.1 undecidable manual P 23 0.0953 133 -0.01 100
IV.T1218.EHZ. 2017-03-04T21:13:34.48 0.1 undecidable manual P 189 0.1007 132 0.1 98
IV.T1214.EHZ. 2017-03-04T21:13:33.65 0.1 undecidable manual P 100 0.0531 149 -0.05 100
IV.T1212.EHZ. 2017-03-04T21:13:33.95 0.1 undecidable manual P 256 0.0701 142 0.04 100
IV.MSAG.HHZ. 2017-03-04T21:13:29.49 3.0 negative manual Pn -2.29 0
IV.MCRV.HHZ. 2017-03-04T21:13:27.61 3.0 negative manual P 0.77 0
IV.MODR.HHZ. 2017-03-04T21:13:17.13 3.0 undecidable manual P -1.33 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1212.EHN. ML:0.6 6.6697545E-5 0.1536 AML other m 2017-03-04T21:13:35.92
IV.T1214.EHN. ML:0.8 9.3669755E-5 1.2544 AML other m 2017-03-04T21:13:36.50
IV.T1214.HNN. ML:0.8 0.00010818162 3.2 AML other m 2017-03-04T21:13:35.35
IV.T1218.EHN. ML:1 0.000116041635 0.8192 AML other m 2017-03-04T21:13:36.69
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