ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.0 on date 17-03-2019 and time 23:25:28 (UTC) in region 8 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 8 km E Norcia (PG), on

  • 17-03-2019 23:25:28 (UTC)
  • 18-03-2019 00:25:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.82, 13.19 at 9 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 8 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Arquata del Tronto AP 10 1178 6416
Montegallo AP 12 523 6939
Preci PG 14 724 7663
Accumoli RI 14 667 8330
Montemonaco AP 15 604 8934
Ussita MC 15 444 9378
Visso MC 15 1107 10485
Cascia PG 18 3217 13702
Acquasanta Terme AP 19 2916 16618
Montefortino FM 19 1178 17796
Bolognola MC 20 142 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
53 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
93 Km W of Pescara (121014 inhabitants)
93 Km S of Ancona (100861 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km E of Viterbo (67173 inhabitants)
100 Km NE of Tivoli (56533 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 1.0 2019-03-17
23:25:28
42.82 13.19 9 2019-03-17
23:37:34
Sala Sismica INGV-Roma 66649541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-17 23:25:28 ± 0.05
Latitude 42.82 ± 0.00
Longitude 13.19 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66649541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 338
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.44966
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 66649541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-17 23:37:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2019-03-17T23:25:45.00 0.3 undecidable manual S 300 0.4497 50 0.48 64
IV.TERO.HHZ. 2019-03-17T23:25:41.50 0.3 undecidable manual S 122 0.3606 50 -0.39 67
IV.RM33.EHZ. 2019-03-17T23:25:40.40 0.3 undecidable manual S 177 0.3085 50 0.06 72
IV.MF5.EHZ. 2019-03-17T23:25:39.40 0.3 undecidable manual S 49 0.2608 108 0.47 67
IV.CSP1.EHZ. 2019-03-17T23:25:39.20 0.3 undecidable manual S 2 0.2752 50 -0.15 71
IV.CESI.HHZ. 2019-03-17T23:25:39.60 0.3 undecidable manual S 312 0.2806 50 0.07 73
IV.LNSS.HHZ. 2019-03-17T23:25:38.30 0.3 undecidable manual S 207 0.2401 109 0.13 72
IV.FDMO.HHZ. 2019-03-17T23:25:37.70 0.1 undecidable manual S 341 0.232 110 -0.16 96
IV.ASSB.HHZ. 2019-03-17T23:25:37.66 0.1 undecidable manual P 300 0.4497 50 -0.04 94
IV.SMA1.EHZ. 2019-03-17T23:25:37.20 0.3 undecidable manual S 150 0.2149 111 -0.03 74
IV.TERO.HHZ. 2019-03-17T23:25:35.85 0.1 undecidable manual P 122 0.3606 50 -0.32 91
IV.MTRA.EHZ. 2019-03-17T23:25:35.40 0.3 undecidable manual S 112 0.1628 117 -0.02 75
IV.RM33.EHZ. 2019-03-17T23:25:35.41 0.1 undecidable manual P 177 0.3085 50 0.13 95
IV.CSP1.EHZ. 2019-03-17T23:25:34.55 0.1 undecidable manual P 2 0.2752 50 -0.16 95
IV.CESI.HHZ. 2019-03-17T23:25:34.70 0.1 undecidable manual P 312 0.2806 50 -0.11 96
IV.MMO1.EHZ. 2019-03-17T23:25:34.00 0.3 undecidable manual S 51 0.1295 123 -0.32 71
IV.MF5.EHZ. 2019-03-17T23:25:34.77 0.1 undecidable manual P 49 0.2608 108 0.31 92
IV.LNSS.HHZ. 2019-03-17T23:25:34.02 0.1 undecidable manual P 207 0.2401 109 0 99
IV.MC2.EHZ. 2019-03-17T23:25:33.20 0.3 undecidable manual S 360 0.0944 132 -0.03 76
IV.SMA1.EHZ. 2019-03-17T23:25:33.49 0.1 undecidable manual P 150 0.2149 111 0.01 99
IV.FDMO.HHZ. 2019-03-17T23:25:33.86 1.0 positive manual P 341 0.232 110 0.01 25
IV.MTRA.EHZ. 2019-03-17T23:25:32.78 0.3 undecidable manual P 112 0.1628 117 0.34 70
IV.MC2.EHZ. 2019-03-17T23:25:31.37 0.1 undecidable manual P 360 0.0944 132 0.19 98
IV.MMO1.EHZ. 2019-03-17T23:25:31.80 1.0 undecidable manual P 51 0.1295 123 0 25
IV.NRCA.HHZ. 2019-03-17T23:25:31.90 0.1 undecidable manual S 287 0.0576 145 -0.39 94
IV.NRCA.HHZ. 2019-03-17T23:25:30.75 0.1 negative manual P 287 0.0576 145 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.00052865505 0.1408 AML other m 2019-03-17T23:25:32.46
IV.NRCA.HHN. ML:1.4 0.0003875729 0.0768 AML other m 2019-03-17T23:25:32.13
IV.NRCA.HNE. ML:1.5 0.00049067475 0.128 AML other m 2019-03-17T23:25:32.45
IV.NRCA.HNN. ML:1.4 0.0003771718 0.064 AML other m 2019-03-17T23:25:32.08
IV.FDMO.HHE. ML:0.7 3.16191E-5 0.2304 AML other m 2019-03-17T23:25:38.27
IV.FDMO.HHN. ML:0.8 3.766349E-5 0.1792 AML other m 2019-03-17T23:25:38.48
IV.LNSS.HHE. ML:1 4.7853375E-5 0.1152 AML other m 2019-03-17T23:25:40.09
IV.LNSS.HHN. ML:1 4.778412E-5 0.2688 AML other m 2019-03-17T23:25:39.77
IV.CSP1.EHE. ML:1.2 6.761722E-5 0.1792 AML other m 2019-03-17T23:25:39.78
IV.CSP1.EHN. ML:1.4 0.0001160511 0.192 AML other m 2019-03-17T23:25:39.66
IV.CESI.HHE. ML:0.6 2.0873495E-5 0.1408 AML other m 2019-03-17T23:25:40.19
IV.CESI.HHN. ML:1 4.9505775E-5 0.1408 AML other m 2019-03-17T23:25:40.11
IV.RM33.EHE. ML:0.8 2.681138E-5 0.1792 AML other m 2019-03-17T23:25:41.49
IV.RM33.EHN. ML:0.6 1.5488145E-5 0.1024 AML other m 2019-03-17T23:25:41.60
IV.TERO.HHE. ML:0.9 2.58677265E-5 0.1536 AML other m 2019-03-17T23:25:42.09
IV.TERO.HHN. ML:0.9 2.934679E-5 0.1152 AML other m 2019-03-17T23:25:41.82
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