Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 24-11-2020 and time 09:32:38 (Italy) in region 2 km NE Ussita (MC)

A magnitude ML 1.1 earthquake occured in region: 2 km NE Ussita (MC), on

  • 24-11-2020 08:32:38 (UTC)
  • 24-11-2020 09:32:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.96, 13.15 at 7 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
Ussita MC 2 444 444
Visso MC 6 1107 1551
Bolognola MC 7 142 1693
Castelsantangelo sul Nera MC 7 281 1974
Acquacanina MC 8 121 2095
Fiastra MC 8 559 2654
Fiordimonte MC 10 202 2856
Pieve Torina MC 12 1458 4314
Pievebovigliana MC 13 866 5180
Monte Cavallo MC 13 145 5325
Preci PG 13 724 6049
Sarnano MC 15 3264 9313
Montefortino FM 16 1178 10491
Montemonaco AP 16 604 11095
Muccia MC 16 915 12010
Amandola FM 17 3629 15639
Cessapalombo MC 19 512 16151
Norcia PG 19 4957 21108
Gualdo MC 19 815 21923
Sellano PG 20 1079 23002
Montegallo AP 20 523 23525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
61 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
96 Km NW of Montesilvano (53738 inhabitants)
99 Km S of Fano (60888 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
Reviewed
Rev100 		ML 1.1 2020-11-24
08:32:38		 42.96 13.15 7 2020-11-24
08:37:35		 Sala Sismica INGV-Roma 84978421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-24 08:32:38 ± 0.09
Latitude 42.96 ± 0.00
Longitude 13.15 ± 0.00
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84978421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 258
Semi-minor axis of confidence ellipse (meter) 89
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 47
Circular confidence region, given by single value of horizontal uncertainty (meter) 260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.27249
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 11
Type of magnitude ML
Reference to an origin 84978421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-24 08:37:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2020-11-24T08:32:46.03 0.6 undecidable manual S 283 0.1853 109 0.33 46
IV.PF6.EHZ. 2020-11-24T08:32:45.51 0.3 undecidable manual S 10 0.1781 109 0.08 73
IV.NRCA.HHZ. 2020-11-24T08:32:44.05 0.6 undecidable manual S 192 0.1313 115 0.3 47
IV.MTRA.HNZ. 2020-11-24T08:32:44.39 0.1 undecidable manual P 139 0.2725 103 0.02 96
IV.CSP1.EHZ. 2020-11-24T08:32:44.00 0.6 undecidable manual S 17 0.1358 115 0.1 48
IV.MMO1.EHZ. 2020-11-24T08:32:44.08 0.6 undecidable manual S 116 0.143 114 -0.07 49
IT.MTCL.HGZ. 2020-11-24T08:32:43.10 0.6 undecidable manual S 286 0.116 118 -0.12 49
IV.MF5.EHZ. 2020-11-24T08:32:43.71 0.6 positive manual P 83 0.2266 105 0.33 45
IV.CESI.HHZ. 2020-11-24T08:32:42.59 0.6 positive manual P 283 0.1853 109 0.08 48
IV.PF6.EHZ. 2020-11-24T08:32:42.20 0.3 undecidable manual P 10 0.1781 109 -0.16 71
IV.MML1.EHZ. 2020-11-24T08:32:42.62 0.1 undecidable manual P 319 0.2005 107 -0.2 94
IV.FEMA.HNZ. 2020-11-24T08:32:42.00 0.6 undecidable manual S 270 0.0746 130 0.1 49
IV.GUMA.HHZ. 2020-11-24T08:32:42.43 0.6 undecidable manual P 53 0.1673 110 0.3 46
IV.FDMO.HHZ. 2020-11-24T08:32:42.30 0.6 undecidable manual S 328 0.0881 125 -0.01 50
IV.NRCA.HHZ. 2020-11-24T08:32:41.22 0.6 undecidable manual P 192 0.1313 115 -0.16 48
IT.MTCL.HGZ. 2020-11-24T08:32:41.02 0.1 undecidable manual P 286 0.116 118 -0.06 98
IV.MC2.EHZ. 2020-11-24T08:32:41.32 0.6 undecidable manual S 152 0.0576 137 -0.1 49
IV.CSP1.EHZ. 2020-11-24T08:32:41.42 0.6 positive manual P 17 0.1358 115 -0.05 49
IV.MMO1.EHZ. 2020-11-24T08:32:41.50 0.6 negative manual P 116 0.143 114 -0.12 48
IV.FDMO.HHZ. 2020-11-24T08:32:40.46 0.6 negative manual P 328 0.0881 125 -0.09 49
IV.FEMA.HNZ. 2020-11-24T08:32:40.32 0.1 undecidable manual P 270 0.0746 130 0.01 100
IV.MC2.EHZ. 2020-11-24T08:32:39.81 0.6 negative manual P 152 0.0576 137 -0.23 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.8 9.8814675E-5 0.1792 AML other m 2020-11-24T08:32:43.33
IV.FDMO.HHN. ML:1.1 0.0001834484 0.3008 AML other m 2020-11-24T08:32:43.14
IV.NRCA.HHE. ML:1.2 0.00015766835 0.1216 AML other m 2020-11-24T08:32:44.77
IV.NRCA.HHN. ML:1.1 0.0001520144 0.1792 AML other m 2020-11-24T08:32:44.40
IV.NRCA.HNE. ML:1.2 0.000175935585 0.1664 AML other m 2020-11-24T08:32:44.86
IV.CSP1.EHE. ML:1.1 0.00012373564 0.3392 AML other m 2020-11-24T08:32:45.15
IV.CSP1.EHN. ML:1.1 0.000140242125 0.2816 AML other m 2020-11-24T08:32:45.03
IV.CESI.HHE. ML:1 8.351944E-5 0.3456 AML other m 2020-11-24T08:32:46.59
IV.CESI.HHN. ML:1 8.477226E-5 0.3008 AML other m 2020-11-24T08:32:46.24
IV.CESI.HNN. ML:1.2 0.000137395635 0.6464 AML other m 2020-11-24T08:32:47.60
IV.MF5.EHE. ML:1 5.998135E-5 0.2368 AML other m 2020-11-24T08:32:48.59
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