Earthquake with magnitude of ML 1.1 on date 21-05-2020 and time 07:15:18 (Italy) in region 5 km NW Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km NW Norcia (PG), on

  • 21-05-2020 05:15:18 (UTC)
  • 21-05-2020 07:15:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.07 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 5 4957 4957
Preci PG 6 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Visso MC 11 1107 7069
Cerreto di Spoleto PG 13 1075 8144
Cascia PG 13 3217 11361
Sellano PG 14 1079 12440
Ussita MC 14 444 12884
Poggiodomo PG 17 117 13001
Vallo di Nera PG 18 364 13365
Monte Cavallo MC 19 145 13510
Arquata del Tronto AP 19 1178 14688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km N 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 1.1 2020-05-21
05:15:18
42.83 13.07 12 2020-05-21
05:20:37
Sala Sismica INGV-Roma 79394351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-21 05:15:18 ± 0.16
Latitude 42.83 ± 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 79394351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 856
Semi-minor axis of confidence ellipse (meter) 571
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 159
Circular confidence region, given by single value of horizontal uncertainty (meter) 860
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 239
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 79394351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-21 05:20:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2020-05-21T05:15:53.99 3.0 undecidable manual S 0.17 0
IV.SACS.HHZ. 2020-05-21T05:15:49.50 3.0 undecidable manual S 0.47 0
IV.ARRO.EHZ. 2020-05-21T05:15:31.56 3.0 undecidable manual S -0.13 0
IV.CSP1.EHZ. 2020-05-21T05:15:29.37 0.3 undecidable manual S 20 0.2779 93 -0.01 95
IV.FDMO.HHZ. 2020-05-21T05:15:27.20 0.3 undecidable manual S 3 0.205 95 -0.05 96
IV.CESI.HHZ. 2020-05-21T05:15:27.30 0.3 undecidable manual S 325 0.2131 94 -0.17 94
IV.MMO1.EHZ. 2020-05-21T05:15:26.70 0.6 undecidable manual S 70 0.1979 95 -0.32 61
IV.MC2.EHZ. 2020-05-21T05:15:24.90 0.3 undecidable manual S 47 0.1169 113 0.22 96
IV.CSP1.EHZ. 2020-05-21T05:15:24.87 0.3 undecidable manual P 20 0.2779 93 0 96
IV.FDMO.HHZ. 2020-05-21T05:15:23.63 0.6 positive manual P 3 0.205 95 0 65
IV.CESI.HHZ. 2020-05-21T05:15:23.96 0.3 positive manual P 325 0.2131 94 0.19 94
IV.MMO1.EHZ. 2020-05-21T05:15:23.44 0.3 positive manual P 70 0.1979 95 -0.07 97
IV.MC2.EHZ. 2020-05-21T05:15:22.36 0.6 positive manual P 47 0.1169 113 0.21 64
IV.NRCA.HHZ. 2020-05-21T05:15:22.80 0.3 undecidable manual S 86 0.0297 160 -0.11 100
IV.NRCA.HHZ. 2020-05-21T05:15:21.25 1.0 undecidable manual P 86 0.0297 160 0.12 33
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.6 0.0006031202 0.0576 AML other m 2020-05-21T05:15:22.94
IV.NRCA.HHN. ML:1.6 0.0005491679 0.0608 AML other m 2020-05-21T05:15:22.96
IV.NRCA.HNE. ML:1.6 0.00056149045 0.0672 AML other m 2020-05-21T05:15:22.93
IV.NRCA.HNN. ML:1.5 0.0004925813 0.0704 AML other m 2020-05-21T05:15:22.99
IV.FDMO.HHE. ML:0.6 2.7017455E-5 0.1408 AML other m 2020-05-21T05:15:27.84
IV.FDMO.HHN. ML:0.6 2.414579E-5 0.1024 AML other m 2020-05-21T05:15:27.84
IV.CESI.HNE. ML:1.2 0.000100535245 0.7712 AML other m 2020-05-21T05:15:36.17
IV.CESI.HNN. ML:1.3 0.00011236102 0.848 AML other m 2020-05-21T05:15:35.56
IV.CESI.HHE. ML:0.7 2.7836635E-5 0.24 AML other m 2020-05-21T05:15:27.88
IV.CESI.HHN. ML:0.7 2.9544835E-5 0.3392 AML other m 2020-05-21T05:15:29.08
IV.CSP1.EHE. ML:1.2 7.4637655E-5 1.6576 AML other m 2020-05-21T05:15:39.01
IV.CSP1.EHN. ML:0.9 3.4208673E-5 1.1392 AML other m 2020-05-21T05:15:38.67
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