Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 05-03-2021 and time 21:43:03 (Italy) in region 2 km NE Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: 2 km NE Norcia (PG), on

  • 05-03-2021 20:43:03 (UTC)
  • 05-03-2021 21:43:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 13.11 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.

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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
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Ussita MC 15 444 10730
Arquata del Tronto AP 16 1178 11908
Cerreto di Spoleto PG 16 1075 12983
Accumoli RI 17 667 13650
Sellano PG 18 1079 14729
Poggiodomo PG 18 117 14846
Montegallo AP 18 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
98 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
Reviewed
Rev100 		ML 1.3 2021-03-05
20:43:03		 42.81 13.11 11 2021-03-05
20:46:51		 Sala Sismica INGV-Roma 87794291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-05 20:43:03 ± 0.07
Latitude 42.81 ± 0.00
Longitude 13.11 ± 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 87794291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 87794291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-05 20:46:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-03-05T20:43:18.14 0.3 undecidable manual S 117 0.4065 50 -0.13 72
IV.CSP1.EHZ. 2021-03-05T20:43:14.79 0.1 undecidable manual S 13 0.2896 50 -0.01 100
IV.CESI.HHZ. 2021-03-05T20:43:13.60 0.1 undecidable manual S 322 0.2473 50 0.06 100
IV.FDMO.HHZ. 2021-03-05T20:43:12.72 0.1 undecidable manual S 355 0.2266 50 -0.23 97
IV.TERO.HHZ. 2021-03-05T20:43:12.12 0.6 undecidable manual P 117 0.4065 50 -0.01 49
IV.GAVE.EHZ. 2021-03-05T20:43:12.14 0.3 undecidable manual S 234 0.1988 50 0.02 76
IV.LNSS.HHZ. 2021-03-05T20:43:12.55 0.3 undecidable manual S 194 0.214 50 -0.02 76
IV.MC2.EHZ. 2021-03-05T20:43:10.09 0.3 undecidable manual S 29 0.1151 131 0.5 70
IV.CSP1.EHZ. 2021-03-05T20:43:10.08 1.0 undecidable manual P 13 0.2896 50 -0.05 25
IV.FDMO.HHZ. 2021-03-05T20:43:09.05 0.3 positive manual P 355 0.2266 50 -0.01 76
IV.CESI.HHZ. 2021-03-05T20:43:09.36 0.6 undecidable manual P 322 0.2473 50 -0.04 50
IV.LNSS.HHZ. 2021-03-05T20:43:08.91 0.3 undecidable manual P 194 0.214 50 0.07 75
IV.GAVE.EHZ. 2021-03-05T20:43:08.76 0.1 undecidable manual P 234 0.1988 50 0.18 98
IV.NRCA.HHZ. 2021-03-05T20:43:07.26 0.1 undecidable manual S 3 0.0234 167 -0.39 97
IV.MC2.EHZ. 2021-03-05T20:43:07.29 0.3 positive manual P 29 0.1151 131 0.17 75
IV.NRCA.HHZ. 2021-03-05T20:43:05.97 1.0 undecidable manual P 3 0.0234 167 -0.03 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.000588775 0.1024 AML other m 2021-03-05T20:43:07.97
IV.NRCA.HHN. ML:1.9 0.0012034365 0.1408 AML other m 2021-03-05T20:43:07.41
IV.NRCA.HNE. ML:1.5 0.00058440605 0.0768 AML other m 2021-03-05T20:43:08.01
IV.NRCA.HNN. ML:1.8 0.001063351 0.1536 AML other m 2021-03-05T20:43:07.42
IV.GAVE.EHE. ML:1.2 0.000101569025 0.1792 AML other m 2021-03-05T20:43:13.84
IV.GAVE.EHN. ML:1.1 7.8351285E-5 0.1792 AML other m 2021-03-05T20:43:12.00
IV.GAVE.HNE. ML:1.3 0.00011837478 0.1664 AML other m 2021-03-05T20:43:13.92
IV.GAVE.HNN. ML:1.4 0.0001790478 0.768 AML other m 2021-03-05T20:43:15.19
IV.LNSS.HHE. ML:1.2 0.000100577885 0.2176 AML other m 2021-03-05T20:43:13.52
IV.LNSS.HHN. ML:1.3 0.0001286555 0.2304 AML other m 2021-03-05T20:43:13.81
IV.LNSS.HNE. ML:1.3 0.000116495575 0.7808 AML other m 2021-03-05T20:43:21.29
IV.LNSS.HNN. ML:1.4 0.000163782695 0.5248 AML other m 2021-03-05T20:43:14.37
IV.FDMO.HHE. ML:1 5.4296795E-5 0.1664 AML other m 2021-03-05T20:43:14.27
IV.FDMO.HHN. ML:1 6.4552595E-5 0.2176 AML other m 2021-03-05T20:43:13.05
IV.CESI.HNE. ML:1.4 0.00014104675 0.6528 AML other m 2021-03-05T20:43:17.46
IV.CESI.HNN. ML:2.3 0.0009569836 0.6016 AML other m 2021-03-05T20:43:21.34
IV.CESI.HHE. ML:1.1 7.194646E-5 0.1152 AML other m 2021-03-05T20:43:13.75
IV.CESI.HHN. ML:1.2 8.4970345E-5 0.2048 AML other m 2021-03-05T20:43:14.15
IV.CSP1.EHE. ML:1.3 9.657423E-5 0.4352 AML other m 2021-03-05T20:43:15.55
IV.CSP1.EHN. ML:1.3 8.086509E-5 0.2944 AML other m 2021-03-05T20:43:15.35
IV.TERO.HHE. ML:0.5 9.614923E-6 0.1408 AML other m 2021-03-05T20:43:20.35
IV.TERO.HHN. ML:0.5 1.03735085E-5 0.1408 AML other m 2021-03-05T20:43:19.09
IV.TERO.HNE. ML:1.6 0.00012062818 0.7168 AML other m 2021-03-05T20:43:21.06
IV.TERO.HNN. ML:1.7 0.0001612112 0.9472 AML other m 2021-03-05T20:43:15.20
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