Earthquake with magnitude of ML 1.0 on date 23-03-2017 and time 02:24:16 (Italy) in region 2 km W Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km W Norcia (PG), on

  • 23-03-2017 01:24:16 (UTC)
  • 23-03-2017 02:24:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.06 at 12 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 2 4957 4957
Cascia PG 9 3217 8174
Preci PG 10 724 8898
Cerreto di Spoleto PG 12 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Poggiodomo PG 14 117 10371
Sellano PG 15 1079 11450
Visso MC 15 1107 12557
Vallo di Nera PG 17 364 12921
Ussita MC 18 444 13365
Monteleone di Spoleto PG 18 599 13964
Accumoli RI 19 667 14631
Arquata del Tronto AP 19 1178 15809
Sant'Anatolia di Narco PG 20 564 16373

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
65 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
95 Km N of Tivoli (56533 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
Reviewed
Rev100
ML 1.0 2017-03-23
01:24:16
42.79 13.07 12 2017-03-23
01:28:24
Sala Sismica INGV-Roma 42803201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-23 01:24:16 ± 0.19
Latitude 42.79 ± 0.01
Longitude 13.07 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 42803201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 930
Semi-minor axis of confidence ellipse (meter) 870
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 930
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.14214
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 2
Type of magnitude ML
Reference to an origin 42803201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-23 01:28:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2017-03-23T01:24:36.82 0.1 undecidable manual P 332 1.1421 90 -0.65 71
IV.T1220.HNZ. 2017-03-23T01:24:33.66 3.0 undecidable manual S 0.51 0
IV.T1216.EHZ. 2017-03-23T01:24:22.23 0.1 undecidable manual S 341 0.1016 121 0.11 100
IV.T1214.EHZ. 2017-03-23T01:24:22.33 0.3 undecidable manual S 108 0.1106 117 -0.03 76
IV.T1212.EHZ. 2017-03-23T01:24:20.79 0.1 undecidable manual S 199 0.0459 151 -0.17 100
IV.T1217.EHZ. 2017-03-23T01:24:20.41 0.6 negative manual P 230 0.1286 110 0.25 48
IV.T1214.EHZ. 2017-03-23T01:24:20.02 0.1 undecidable manual P 108 0.1106 117 0.14 99
IV.NRCA.HHZ. 2017-03-23T01:24:20.84 0.1 undecidable manual S 43 0.0531 146 -0.23 97
IV.MC2.EHZ. 2017-03-23T01:24:20.82 1.0 undecidable manual P 38 0.1475 104 0.34 24
IV.T1245.HHZ. 2017-03-23T01:24:20.09 0.6 undecidable manual P 55 0.1088 118 0.23 49
IV.FDMO.HHZ. 2017-03-23T01:24:20.56 3.0 undecidable manual P -2.18 0
IV.T1212.EHZ. 2017-03-23T01:24:19.25 1.0 negative manual P 199 0.0459 151 0.17 25
IV.NRCA.HHZ. 2017-03-23T01:24:19.30 0.1 undecidable manual P 43 0.0531 146 0.16 100
IV.T1216.EHZ. 2017-03-23T01:24:19.98 0.6 negative manual P 341 0.1016 121 0.23 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.000315 1.84 AML other m 2017-03-23T01:24:20.99
IV.NRCA.HHN. ML:1.1 0.000173 0.66 AML other m 2017-03-23T01:24:21.98
IV.T1245.HHN. ML:0.9 7.33E-5 0.26 AML other m 2017-03-23T01:24:22.90
IV.T1245.HHE. ML:0.7 5.215E-5 0.76 AML other m 2017-03-23T01:24:23.43
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