Earthquake with magnitude of ML 1.1 on date 25-02-2020 and time 17:02:49 (Italy) in region 1 km NE Norcia (PG)

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

  • 25-02-2020 16:02:49 (UTC)
  • 25-02-2020 17:02:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.1 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 1 4957 4957
Preci PG 11 724 5681
Cascia PG 12 3217 8898
Castelsantangelo sul Nera MC 12 281 9179
Visso MC 15 1107 10286
Cerreto di Spoleto PG 16 1075 11361
Arquata del Tronto AP 16 1178 12539
Accumoli RI 16 667 13206
Ussita MC 17 444 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)
51 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
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 2020-02-25
16:02:49
42.8 13.11 9 2020-02-25
16:13:41
Sala Sismica INGV-Roma 76805151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-25 16:02:49 ± 0.05
Latitude 42.80 ± 0.00
Longitude 13.11 ± 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 76805151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 304
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32106
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 76805151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-25 16:13:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2020-02-25T16:03:40.91 3.0 undecidable manual Sn 0.44 0
IV.GIUL.HHZ. 2020-02-25T16:03:29.25 3.0 undecidable manual S -0.47 0
IV.CIGN.HHZ. 2020-02-25T16:03:21.73 3.0 undecidable manual Pg 2.89 0
IV.NARO.HHZ. 2020-02-25T16:03:18.91 3.0 undecidable manual S -1.98 0
IV.MF5.EHZ. 2020-02-25T16:03:01.76 0.6 undecidable manual S 54 0.3211 50 0.3 47
IV.RM33.EHZ. 2020-02-25T16:03:00.85 0.6 undecidable manual S 164 0.3004 50 0.02 50
IV.CESI.HHZ. 2020-02-25T16:02:59.02 0.6 undecidable manual S 325 0.2536 108 -0.26 48
IV.FDMO.HHZ. 2020-02-25T16:02:58.46 0.6 undecidable manual S 357 0.2383 109 -0.28 48
IV.LNSS.HHZ. 2020-02-25T16:02:57.42 0.6 undecidable manual S 194 0.2014 112 0.03 51
IV.MTRA.EHZ. 2020-02-25T16:02:57.78 0.6 undecidable manual S 101 0.2176 111 -0.21 49
IV.MF5.EHZ. 2020-02-25T16:02:56.39 1.0 negative manual P 54 0.3211 50 0.18 24
IV.GAVE.HNZ. 2020-02-25T16:02:56.96 0.6 undecidable manual S 236 0.188 113 0.05 51
IV.MMO1.EHZ. 2020-02-25T16:02:56.90 0.6 undecidable manual S 58 0.1916 113 -0.15 50
IV.MC2.EHZ. 2020-02-25T16:02:55.25 0.6 undecidable manual S 29 0.1286 122 0.35 48
IV.RM33.EHZ. 2020-02-25T16:02:55.88 0.1 undecidable manual P 164 0.3004 50 0.03 100
IV.SMA1.EHZ. 2020-02-25T16:02:54.52 1.0 positive manual P 135 0.2383 109 -0.11 25
IV.T1299.. 2020-02-25T16:02:54.16 3.0 undecidable manual P 0
IV.CESI.HHZ. 2020-02-25T16:02:54.87 0.3 undecidable manual P 325 0.2536 108 -0.08 75
IV.FDMO.HHZ. 2020-02-25T16:02:54.49 0.1 positive manual P 357 0.2383 109 -0.15 99
IT.MTCL.HGZ. 2020-02-25T16:02:53.93 0.1 undecidable manual P 338 0.2104 111 -0.12 100
IV.GAVE.HNZ. 2020-02-25T16:02:53.74 0.1 undecidable manual P 236 0.188 113 0.15 100
IV.MMO1.EHZ. 2020-02-25T16:02:53.54 0.6 undecidable manual P 58 0.1916 113 -0.12 50
IV.LNSS.HHZ. 2020-02-25T16:02:53.72 0.1 undecidable manual P 194 0.2014 112 -0.14 100
IV.MTRA.EHZ. 2020-02-25T16:02:53.97 0.1 undecidable manual P 101 0.2176 111 -0.24 97
IV.MC2.EHZ. 2020-02-25T16:02:52.72 0.1 undecidable manual P 29 0.1286 122 0.3 98
IV.NRCA.HNZ. 2020-02-25T16:02:52.55 0.6 undecidable manual S 11 0.036 156 0.09 52
IV.NRCA.HNZ. 2020-02-25T16:02:51.31 0.1 negative manual P 11 0.036 156 0.29 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0 0.001380845 0.0512 AML other m 2020-02-25T16:02:52.63
IV.NRCA.HHN. ML:0 0.0019921405 0.0768 AML other m 2020-02-25T16:02:52.62
IV.NRCA.HNE. ML:0 0.001389472 0.0768 AML other m 2020-02-25T16:02:52.63
IV.NRCA.HNN. ML:0 0.0017240305 0.0768 AML other m 2020-02-25T16:02:52.62
IV.LNSS.HHE. ML:1.3 0.000135880925 0.0896 AML other m 2020-02-25T16:02:58.04
IV.LNSS.HHN. ML:1.2 0.00011921955 0.1024 AML other m 2020-02-25T16:02:58.17
IV.LNSS.HNE. ML:1.2 0.00011848211 0.1024 AML other m 2020-02-25T16:02:57.99
IV.FDMO.HHE. ML:0.9 4.634444E-5 0.1024 AML other m 2020-02-25T16:02:59.10
IV.FDMO.HHN. ML:0.9 4.4773755E-5 0.2048 AML other m 2020-02-25T16:02:59.82
IV.SMA1.EHE. ML:1.2 7.85052E-5 0.2944 AML other m 2020-02-25T16:03:00.44
IV.SMA1.EHN. ML:1.2 8.4265075E-5 0.4096 AML other m 2020-02-25T16:03:02.01
IV.CESI.HHE. ML:0.9 3.94789E-5 0.256 AML other m 2020-02-25T16:02:59.33
IV.CESI.HHN. ML:1.1 6.780516E-5 0.32 AML other m 2020-02-25T16:02:59.48
IV.RM33.EHE. ML:1 3.8667205E-5 0.1664 AML other m 2020-02-25T16:03:01.84
IV.RM33.EHN. ML:0.8 3.078447E-5 0.128 AML other m 2020-02-25T16:03:01.88
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