Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-02-2020 and time 08:23:10 (Italy) in region 1 km N Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 1 km N Norcia (PG), on

  • 27-02-2020 07:23:10 (UTC)
  • 27-02-2020 08:23:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 13.09 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 9 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 14 1075 11361
Ussita MC 16 444 11805
Sellano PG 16 1079 12884
Poggiodomo PG 16 117 13001
Arquata del Tronto AP 17 1178 14179
Accumoli RI 18 667 14846
Vallo di Nera PG 19 364 15210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
100 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
Rev 100 ML 1.8 2020-02-27
07:23:10		 42.81 13.09 9 2020-02-27
07:32:49		 Sala Sismica INGV-Roma 76862091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-27 07:23:10 ± 0.06
Latitude 42.81 ± 0.00
Longitude 13.09 ± 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 76862091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 373
Semi-minor axis of confidence ellipse (meter) 161
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38131
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 76862091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-27 07:32:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SAP2.EHZ. 2020-02-27T07:23:24.73 3.0 undecidable manual S 0.1 0
IV.MF5.EHZ. 2020-02-27T07:23:23.43 0.3 undecidable manual S 56 0.3256 50 0.67 61
IV.CAMP.HHZ. 2020-02-27T07:23:23.14 0.3 undecidable manual S 139 0.3579 50 -0.58 63
IV.RM33.EHZ. 2020-02-27T07:23:22.40 0.3 undecidable manual S 163 0.3112 50 0.07 71
IV.FIAM.HHZ. 2020-02-27T07:23:21.33 3.0 undecidable manual P 0.07 0
IV.SMA1.EHZ. 2020-02-27T07:23:20.32 0.6 undecidable manual S 134 0.2518 107 0.01 49
IV.CESI.HHZ. 2020-02-27T07:23:19.54 0.3 undecidable manual S 326 0.2401 108 -0.35 68
IV.T1299.HNN. 2020-02-27T07:23:19.48 0.3 undecidable manual S 141 0.223 110 0.24 70
IV.FDMO.HHZ. 2020-02-27T07:23:19.05 0.1 undecidable manual S 360 0.2302 109 -0.46 89
IV.MTRA.EHZ. 2020-02-27T07:23:19.24 0.3 undecidable manual S 102 0.2302 109 -0.28 69
IV.MOMA.HHZ. 2020-02-27T07:23:18.91 3.0 positive manual P 0.2 0
IV.MMO1.EHZ. 2020-02-27T07:23:18.16 0.3 undecidable manual S 62 0.197 112 -0.15 72
IV.LNSS.HHZ. 2020-02-27T07:23:18.62 0.3 undecidable manual S 190 0.2068 111 -0.05 73
IV.TERO.HHZ. 2020-02-27T07:23:18.58 3.0 positive manual P -0.45 0
IT.GNU.HGN. 2020-02-27T07:23:18.87 0.3 undecidable manual P 270 0.3813 50 0.49 64
IV.GIGS.HHZ. 2020-02-27T07:23:18.93 3.0 undecidable manual P -1.58 0
IV.GUMA.HHE. 2020-02-27T07:23:17.12 0.3 undecidable manual P 35 0.313 50 -0.09 71
IV.CAMP.HHZ. 2020-02-27T07:23:17.51 1.0 negative manual P 139 0.3579 50 -0.47 22
IV.RM33.EHZ. 2020-02-27T07:23:17.24 0.3 undecidable manual P 163 0.3112 50 0.06 71
IV.GAVE.EHZ. 2020-02-27T07:23:17.87 0.3 undecidable manual S 232 0.1835 113 0.03 74
IV.MF5.EHZ. 2020-02-27T07:23:17.44 0.6 positive manual P 56 0.3256 50 0.01 48
IV.CSP1.EHZ. 2020-02-27T07:23:16.64 3.0 undecidable manual P -0.44 0
IV.MC2.EHZ. 2020-02-27T07:23:16.29 0.1 undecidable manual S 35 0.1277 122 0.37 93
IV.FDMO.HHZ. 2020-02-27T07:23:15.35 0.6 negative manual P 360 0.2302 109 -0.2 47
IV.MTRA.EHZ. 2020-02-27T07:23:15.31 0.1 undecidable manual P 102 0.2302 109 -0.25 93
IV.CESI.HHZ. 2020-02-27T07:23:15.59 0.1 undecidable manual P 326 0.2401 108 -0.18 94
IV.T1299.HNN. 2020-02-27T07:23:15.48 0.1 undecidable manual P 141 0.223 110 0.08 96
IV.LNSS.HHZ. 2020-02-27T07:23:15.00 0.3 positive manual P 190 0.2068 111 -0.06 73
IV.SMA1.EHZ. 2020-02-27T07:23:15.78 0.6 positive manual P 134 0.2518 107 -0.23 47
IT.MTCL.HGZ. 2020-02-27T07:23:15.00 0.3 undecidable manual P 341 0.1988 112 0.1 72
IV.GAVE.EHZ. 2020-02-27T07:23:14.67 0.1 positive manual P 232 0.1835 113 0.09 97
IV.MMO1.EHZ. 2020-02-27T07:23:14.81 0.3 negative manual P 62 0.197 112 -0.05 73
IV.MC2.EHZ. 2020-02-27T07:23:13.76 0.1 negative manual P 35 0.1277 122 0.28 94
IV.NRCA.HHZ. 2020-02-27T07:23:13.52 0.1 undecidable manual S 33 0.0324 158 0.09 100
IV.NRCA.HHZ. 2020-02-27T07:23:12.30 0.1 undecidable manual P 33 0.0324 158 0.26 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0 0.0001891267 0.3008 AML other m 2020-02-27T07:23:19.31
IV.FDMO.HHE. ML:0 0.00021608755 0.24 AML other m 2020-02-27T07:23:19.32
IV.NRCA.HHE. ML:0 0.003232868 0.0992 AML other m 2020-02-27T07:23:13.72
IV.NRCA.HHN. ML:0 0.003065744 0.1376 AML other m 2020-02-27T07:23:13.70
IV.NRCA.HNE. ML:0 0.002967769 0.1088 AML other m 2020-02-27T07:23:13.72
IV.NRCA.HNN. ML:0 0.0028934565 0.1376 AML other m 2020-02-27T07:23:13.63
IV.GAVE.EHE. ML:2 0.0008192398 0.1216 AML other m 2020-02-27T07:23:18.14
IV.GAVE.EHN. ML:2 0.00083623795 0.2016 AML other m 2020-02-27T07:23:18.55
IV.GAVE.HNE. ML:2 0.00081880505 0.1216 AML other m 2020-02-27T07:23:18.14
IV.GAVE.HNN. ML:1.5 0.00025154765 0.2304 AML other m 2020-02-27T07:23:18.54
IV.LNSS.HHE. ML:1.9 0.0004950491 0.16 AML other m 2020-02-27T07:23:19.27
IV.LNSS.HHN. ML:2.1 0.0008199668 0.1792 AML other m 2020-02-27T07:23:19.05
IV.LNSS.HNE. ML:1.8 0.00046782365 0.1888 AML other m 2020-02-27T07:23:18.89
IV.LNSS.HNN. ML:2 0.00074179895 0.2976 AML other m 2020-02-27T07:23:19.05
IV.MTRA.EHE. ML:2 0.0006528409 0.1792 AML other m 2020-02-27T07:23:20.09
IV.MTRA.EHN. ML:1.9 0.0005454177 0.2016 AML other m 2020-02-27T07:23:19.92
IV.MTRA.HNE. ML:2 0.00064827405 0.1888 AML other m 2020-02-27T07:23:20.09
IV.MTRA.HNN. ML:2 0.0005543255 0.2016 AML other m 2020-02-27T07:23:19.92
IV.CESI.HNN. ML:1.7 0.0003075373 0.3776 AML other m 2020-02-27T07:23:20.22
IV.CESI.HHE. ML:1.4 0.00015300525 0.2592 AML other m 2020-02-27T07:23:19.83
IV.CESI.HHN. ML:1.6 0.0002301597 0.3584 AML other m 2020-02-27T07:23:20.03
IV.SMA1.EHE. ML:1.6 0.0002304807 0.2176 AML other m 2020-02-27T07:23:21.84
IV.SMA1.EHN. ML:1.6 0.0002192558 0.3424 AML other m 2020-02-27T07:23:24.10
IV.CSP1.EHE. ML:1.8 0.00029215105 0.2784 AML other m 2020-02-27T07:23:22.17
IV.CSP1.EHN. ML:1.6 0.0001894696 0.4 AML other m 2020-02-27T07:23:22.29
IV.RM33.HNE. ML:1.7 0.0002003074 0.1984 AML other m 2020-02-27T07:23:23.76
IV.RM33.EHE. ML:1.5 0.00014098935 0.16 AML other m 2020-02-27T07:23:23.77
IV.RM33.EHN. ML:1.5 0.0001250034 0.16 AML other m 2020-02-27T07:23:23.57
IV.MF5.EHE. ML:2 0.00035335275 0.2208 AML other m 2020-02-27T07:23:23.69
IV.MF5.EHN. ML:1.7 0.00019865325 0.2592 AML other m 2020-02-27T07:23:23.69
IV.TERO.HHE. ML:1.5 9.517869E-5 0.16 AML other m 2020-02-27T07:23:25.36
IV.TERO.HHN. ML:1.6 0.000106508945 0.0576 AML other m 2020-02-27T07:23:25.75
IV.MOMA.HNE. ML:1.9 0.00026264505 0.1888 AML other m 2020-02-27T07:23:25.85
IV.MOMA.HHE. ML:1.9 0.00028166935 0.1792 AML other m 2020-02-27T07:23:25.93
IV.MOMA.HHN. ML:1.5 0.00010339036 0.16 AML other m 2020-02-27T07:23:26.00
IV.FIAM.HHN. ML:1.2 2.916406E-5 0.4608 AML other m 2020-02-27T07:23:29.66
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