Earthquake with magnitude of ML 1.4 on date 27-02-2020 and time 02:20:43 (Italy) in region 1 km N Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 1 km N Norcia (PG), on

  • 27-02-2020 01:20:43 (UTC)
  • 27-02-2020 02:20:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 13.1 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.

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 9 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 15 1075 11361
Ussita MC 16 444 11805
Sellano PG 17 1079 12884
Poggiodomo PG 17 117 13001
Arquata del Tronto AP 17 1178 14179
Accumoli RI 18 667 14846
Vallo di Nera PG 19 364 15210
Montegallo AP 20 523 15733

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 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 1.4 2020-02-27
01:20:43
42.81 13.1 10 2020-02-27
01:43:45
Sala Sismica INGV-Roma 76853871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-27 01:20:43 ± 0.08
Latitude 42.81 ± 0.00
Longitude 13.10 ± 0.00
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76853871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 496
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24821
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 76853871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-27 01:43:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.T0110.HHZ. 2020-02-27T01:21:08.00 3.0 undecidable manual S -1.41 0
IV.LNSS.HHZ. 2020-02-27T01:20:51.72 0.3 undecidable manual S 191 0.2068 112 -0.01 73
IV.MMO1.EHZ. 2020-02-27T01:20:51.22 0.3 undecidable manual S 61 0.1943 114 -0.06 73
IV.GAVE.EHZ. 2020-02-27T01:20:50.98 0.1 undecidable manual S 233 0.1862 115 -0.03 98
IV.SMA1.EHZ. 2020-02-27T01:20:49.11 0.3 undecidable manual P 135 0.2482 109 0.15 71
IV.FDMO.HHZ. 2020-02-27T01:20:48.37 0.3 undecidable manual P 359 0.2311 110 -0.23 71
IV.LNSS.HHZ. 2020-02-27T01:20:48.06 0.1 undecidable manual P 191 0.2068 112 -0.03 98
IV.MTRA.EHZ. 2020-02-27T01:20:48.39 0.3 undecidable manual P 102 0.2266 111 -0.11 72
IV.GAVE.EHZ. 2020-02-27T01:20:47.68 0.1 undecidable manual P 233 0.1862 115 0 98
IV.MMO1.EHZ. 2020-02-27T01:20:47.75 0.1 undecidable manual P 61 0.1943 114 -0.09 97
IV.MC2.EHZ. 2020-02-27T01:20:46.81 0.3 undecidable manual P 33 0.1259 124 0.3 70
IV.NRCA.HHZ. 2020-02-27T01:20:46.60 0.1 undecidable manual S 26 0.0315 160 -0.03 100
IV.NRCA.HHZ. 2020-02-27T01:20:45.32 0.1 undecidable manual P 26 0.0315 160 0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.0006265 0.08 AML other m 2020-02-27T01:20:46.64
IV.NRCA.HHE. ML:1.4 0.0004355 0.82 AML other m 2020-02-27T01:20:47.94
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