Earthquake with magnitude of Md 1.8 on date 21-02-2020 and time 03:34:45 (Italy) in region 6 km NW Preci (PG)

A magnitude Md 1.8 earthquake occured in region: 6 km NW Preci (PG), on

  • 21-02-2020 02:34:45 (UTC)
  • 21-02-2020 03:34:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.01 at 11 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
Preci PG 6 724 724
Visso MC 6 1107 1831
Monte Cavallo MC 8 145 1976
Sellano PG 8 1079 3055
Ussita MC 11 444 3499
Castelsantangelo sul Nera MC 12 281 3780
Pieve Torina MC 14 1458 5238
Cerreto di Spoleto PG 14 1075 6313
Fiordimonte MC 14 202 6515
Norcia PG 16 4957 11472
Pievebovigliana MC 16 866 12338
Fiastra MC 17 559 12897
Serravalle di Chienti MC 17 1070 13967
Acquacanina MC 18 121 14088
Muccia MC 18 915 15003
Bolognola MC 19 142 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 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 Md 1.8 2020-02-21
02:34:45
42.93 13.01 11 2020-02-21
02:41:32
Sala Sismica INGV-Roma 76689221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 02:34:45 ± 0.03
Latitude 42.93 ± 0.00
Longitude 13.01 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76689221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 288
Semi-minor axis of confidence ellipse (meter) 187
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 39
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) 0.6619
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 26
Magnitude information

Md:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 9
Type of magnitude Md
Reference to an origin 76689221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 02:41:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TOLF.HHZ. 2020-02-21T02:35:09.20 3.0 undecidable manual Pg 11.84 0
IV.SMA1.EHZ. 2020-02-21T02:34:59.20 0.6 undecidable manual S 141 0.3777 50 0.24 46
IV.FIAM.HHZ. 2020-02-21T02:34:57.91 0.1 undecidable manual P 173 0.6619 50 -0.1 88
IV.LNSS.HHZ. 2020-02-21T02:34:57.50 0.6 undecidable manual S 176 0.3229 50 0.17 47
IV.MTRA.EHZ. 2020-02-21T02:34:57.40 0.6 undecidable manual S 121 0.3283 50 -0.08 48
IV.SNTG.HHZ. 2020-02-21T02:34:57.60 0.6 undecidable manual S 351 0.3336 50 -0.05 48
IV.GUMA.HHZ. 2020-02-21T02:34:56.28 0.6 undecidable manual S 60 0.2725 50 0.43 45
IV.ARVD.HHZ. 2020-02-21T02:34:56.49 0.3 positive manual P 355 0.5747 50 -0.04 68
IV.CAMP.HHZ. 2020-02-21T02:34:55.01 1.0 undecidable manual P 143 0.4865 50 0 23
IV.MURB.HHZ. 2020-02-21T02:34:55.22 0.6 undecidable manual P 314 0.4901 50 0.13 46
IV.MNTT.EHZ. 2020-02-21T02:34:55.09 0.6 positive manual P 72 0.4479 50 0.74 39
IV.GAVE.EHZ. 2020-02-21T02:34:55.16 0.6 undecidable manual S 200 0.2491 50 0.03 49
IV.TERO.HHZ. 2020-02-21T02:34:55.80 0.1 undecidable manual P 125 0.5288 50 0.06 92
IV.CSP1.EHZ. 2020-02-21T02:34:54.03 0.6 undecidable manual S 40 0.2176 50 -0.18 48
IV.CESX.HHZ. 2020-02-21T02:34:54.19 0.6 positive manual P 225 0.4452 50 -0.12 46
IV.MMO1.EHZ. 2020-02-21T02:34:54.32 0.6 undecidable manual S 96 0.2311 50 -0.3 46
IV.RM33.EHZ. 2020-02-21T02:34:54.12 1.0 undecidable manual P 160 0.4416 50 -0.13 23
IV.SMA1.EHZ. 2020-02-21T02:34:53.16 0.6 negative manual P 141 0.3777 50 0 48
IV.FOSV.EHZ. 2020-02-21T02:34:53.71 0.6 negative manual P 334 0.4119 50 -0.04 47
IV.ATCC.EHZ. 2020-02-21T02:34:53.19 0.6 positive manual P 314 0.3759 50 0.06 47
IV.EL6.EHZ. 2020-02-21T02:34:53.60 0.1 positive manual P 9 0.4092 50 -0.09 93
IV.ARRO.EHZ. 2020-02-21T02:34:53.37 0.6 negative manual P 208 0.3903 50 -0.01 48
IV.SNTG.HHZ. 2020-02-21T02:34:52.22 0.1 undecidable manual P 351 0.3336 50 -0.18 93
IV.MOMA.HHZ. 2020-02-21T02:34:52.71 0.6 negative manual P 250 0.3462 50 0.09 47
IV.LNSS.HHZ. 2020-02-21T02:34:52.04 0.1 undecidable manual P 176 0.3229 50 -0.18 93
IV.MTRA.EHZ. 2020-02-21T02:34:52.20 1.0 negative manual P 121 0.3283 50 -0.11 24
IV.CESI.HNZ. 2020-02-21T02:34:51.04 0.6 undecidable manual S 315 0.1124 131 0.09 50
IV.GUMA.HHZ. 2020-02-21T02:34:51.54 0.1 positive manual P 60 0.2725 50 0.18 94
IV.FDMO.HHZ. 2020-02-21T02:34:51.14 0.6 undecidable manual S 26 0.1241 128 -0.16 49
IV.GAVE.EHZ. 2020-02-21T02:34:50.97 0.1 positive manual P 200 0.2491 50 0.02 98
IV.CSP1.EHZ. 2020-02-21T02:34:50.31 0.1 positive manual P 40 0.2176 50 -0.11 97
IV.NRCA.HHZ. 2020-02-21T02:34:50.94 0.6 undecidable manual S 141 0.1178 129 -0.19 48
IV.MMO1.EHZ. 2020-02-21T02:34:50.53 0.3 negative manual P 96 0.2311 50 -0.13 72
IV.FEMA.HNZ. 2020-02-21T02:34:49.40 0.6 undecidable manual S 37 0.0459 155 0.03 51
IT.MTCL.HGZ. 2020-02-21T02:34:49.50 0.6 undecidable manual S 352 0.0692 145 -0.33 47
IV.NRCA.HHZ. 2020-02-21T02:34:48.62 0.6 undecidable manual P 141 0.1178 129 -0.02 50
IV.CESI.HNZ. 2020-02-21T02:34:48.72 0.3 undecidable manual P 315 0.1124 131 0.18 73
IV.FDMO.HHZ. 2020-02-21T02:34:48.71 0.1 undecidable manual P 26 0.1241 128 -0.03 100
IV.FEMA.HNZ. 2020-02-21T02:34:47.88 0.1 negative manual P 37 0.0459 155 0.25 97
IT.MTCL.HGZ. 2020-02-21T02:34:47.98 0.6 negative manual P 352 0.0692 145 0.09 50
CR.ZAG.BHZ. 2020-02-21T02:34:31.02 3.0 undecidable manual Pn 0.76 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNZ. Md:1.5 15 END duration s
IT.MTCL.HGZ. Md:1.6 17 END duration s
IV.FDMO.HHZ. Md:1.8 21 END duration s
IV.NRCA.HHZ. Md:1.6 17 END duration s
IV.CESI.HNZ. Md:1.9 24 END duration s
IV.CSP1.EHZ. Md:1.8 21 END duration s
IV.MMO1.EHZ. Md:1.9 21 END duration s
IV.GAVE.EHZ. Md:1.8 19 END duration s
IV.GUMA.HHZ. Md:1.9 22 END duration s
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