Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 26-02-2020 and time 20:42:58 (Italy) in region 1 km NE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 1 km NE Norcia (PG), on

  • 26-02-2020 19:42:58 (UTC)
  • 26-02-2020 20:42:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8010, 13.1050 at 10 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 1 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 15 1107 10286
Cerreto di Spoleto PG 15 1075 11361
Arquata del Tronto AP 16 1178 12539
Ussita MC 16 444 12983
Accumoli RI 17 667 13650
Poggiodomo PG 17 117 13767
Sellano PG 18 1079 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
98 Km W of Pescara (121014 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-02-26
19:42:58		 42.8007 13.1048 10 2020-02-26
20:09:12		 Sala Sismica INGV-Roma 76848261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-26 19:42:58 ± 0.07
Latitude 42.8007 ± 0.0036
Longitude 13.1048 ± 0.0074
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76848261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 634
Semi-minor axis of confidence ellipse (meter) 51
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30217
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 76848261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-26 20:09:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.DRE.HHZ. 2020-02-26T19:44:47.85 3.0 undecidable manual Sg 12.28 0
IV.SALB.HHZ. 2020-02-26T19:44:44.64 3.0 undecidable manual Sg 12.38 0
XK.GIZZ.HHZ. 2020-02-26T19:44:44.00 3.0 undecidable manual Sn -4.19 0
IT.VALS.HNZ. 2020-02-26T19:44:32.49 3.0 undecidable manual Sn -9.6 0
IV.MSRU.HHZ. 2020-02-26T19:44:21.29 3.0 undecidable manual Pg 17.709999 0
IV.ACATE.EHZ. 2020-02-26T19:44:17.61 3.0 negative manual Pn 0.76 0
IV.MRLC.HHZ. 2020-02-26T19:44:01.02 3.0 undecidable manual Sn -4.61 0
IV.SGRT.HHZ. 2020-02-26T19:43:59.00 3.0 undecidable manual Sg 3.16 0
IV.MTMR.HNZ. 2020-02-26T19:43:54.74 3.0 undecidable manual Sn -1.87 0
IV.ZOVE.HNZ. 2020-02-26T19:43:52.99 3.0 undecidable manual Pg 8.68 0
IV.NDIM.HNZ. 2020-02-26T19:43:46.66 3.0 negative manual Pg 6.42 0
IV.PTRJ.HNZ. 2020-02-26T19:43:45.76 3.0 undecidable manual Sg 3.09 0
IV.MRVN.HHZ. 2020-02-26T19:43:45.18 3.0 undecidable manual Pg 7.7 0
IV.MIDA.HHZ. 2020-02-26T19:43:30.43 3.0 undecidable manual Sn -3.84 0
IV.SGRT.HHZ. 2020-02-26T19:43:26.65 3.0 undecidable manual Pn -2.26 0
IV.MAON.HHZ. 2020-02-26T19:43:24.71 3.0 undecidable manual Pg 3.7 0
IV.PTRJ.HNZ. 2020-02-26T19:43:22.89 3.0 undecidable manual Pg 1.38 0
IV.RM33.HNN. 2020-02-26T19:43:10.96 0.6 undecidable manual S 165 33.5442 50 0.47 44
IV.CSP1.EHZ. 2020-02-26T19:43:10.45 0.6 undecidable manual S 14 33.3444 50 0.03 48
IV.FDMO.HHZ. 2020-02-26T19:43:08.30 0.6 undecidable manual S 357 26.1516 50 -0.23 47
IV.CESI.HHZ. 2020-02-26T19:43:08.92 0.6 undecidable manual S 324 27.8499 50 -0.06 49
IV.SMA1.EHZ. 2020-02-26T19:43:08.10 0.6 undecidable manual S 135 26.6511 50 -0.54 44
IV.RMP.HHZ. 2020-02-26T19:43:07.49 3.0 negative manual P -2.1 0
IV.T1299.HNE. 2020-02-26T19:43:07.50 0.6 undecidable manual S 142 23.4543 113 -0.17 48
IT.MTCL.HGE. 2020-02-26T19:43:07.41 0.6 undecidable manual S 338 23.0547 113 -0.15 48
IV.MMO1.EHZ. 2020-02-26T19:43:06.70 0.6 undecidable manual S 59 21.1677 115 -0.23 47
IV.LNSS.HHZ. 2020-02-26T19:43:06.79 0.6 undecidable manual S 194 22.5552 114 -0.6 43
IV.RM33.HNN. 2020-02-26T19:43:06.11 0.3 undecidable manual P 165 33.5442 50 0.55 65
IV.CSP1.EHZ. 2020-02-26T19:43:05.52 0.3 undecidable manual P 14 33.3444 50 0 73
IV.MC2.EHE. 2020-02-26T19:43:05.15 0.6 undecidable manual S 29 14.0748 125 0.34 47
IV.LNSS.HHZ. 2020-02-26T19:43:04.01 0.3 undecidable manual P 194 22.5552 114 0.24 71
IV.SMA1.EHZ. 2020-02-26T19:43:04.40 0.3 undecidable manual P 135 26.6511 50 -0.1 72
IV.FDMO.HHZ. 2020-02-26T19:43:04.30 0.3 undecidable manual P 357 26.1516 50 -0.13 72
IV.CESI.HHZ. 2020-02-26T19:43:04.65 0.3 undecidable manual P 324 27.8499 50 -0.04 73
IV.T1299.HNE. 2020-02-26T19:43:03.84 0.3 undecidable manual P 142 23.4543 113 -0.09 73
IT.MTCL.HGE. 2020-02-26T19:43:03.79 0.3 undecidable manual P 338 23.0547 113 -0.08 73
IV.MMO1.EHZ. 2020-02-26T19:43:03.50 0.3 undecidable manual P 59 21.1677 115 0 75
IV.NRCA.HNZ. 2020-02-26T19:43:02.36 0.6 undecidable manual S 12 3.6963 159 -0.16 50
IV.MC2.EHE. 2020-02-26T19:43:02.60 0.3 undecidable manual P 29 14.0748 125 0.32 71
IV.NRCA.HNZ. 2020-02-26T19:43:01.08 0.1 positive manual P 12 3.6963 159 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.1 0.00006596993 0.1408 AML other m 2020-02-26T19:43:08.83
IV.FDMO.HHN. ML:0.9 0.0000456761515 0.2048 AML other m 2020-02-26T19:43:08.43
IV.SMA1.EHN. ML:1.1 0.000074880965 0.3072 AML other m 2020-02-26T19:43:09.25
IV.CESI.HHE. ML:1.1 0.00006962385499999999 0.1408 AML other m 2020-02-26T19:43:08.97
IV.CESI.HHN. ML:1.3 0.00009681459000000001 0.256 AML other m 2020-02-26T19:43:09.11
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format not available