Earthquake with magnitude of ML 1.0 on date 20-01-2021 and time 09:30:56 (Italy) in region 3 km E Valtopina (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km E Valtopina (PG), on

  • 20-01-2021 08:30:56 (UTC)
  • 20-01-2021 09:30:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.06, 12.79 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
Valtopina PG 3 1398 1398
Nocera Umbra PG 6 5839 7237
Spello PG 12 8645 15882
Serravalle di Chienti MC 13 1070 16952
Foligno PG 14 57155 74107
Assisi PG 14 28299 102406
Sefro MC 16 422 102828
Cannara PG 18 4305 107133
Fiuminata MC 18 1402 108535
Monte Cavallo MC 19 145 108680
Valfabbrica PG 19 3389 112069
Gualdo Tadino PG 19 15208 127277
Bastia Umbra PG 20 21874 149151

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NE of Foligno (57155 inhabitants)
33 Km E of Perugia (166134 inhabitants)
57 Km N of Terni (111501 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
86 Km SE of Arezzo (99543 inhabitants)
87 Km NW of Teramo (54892 inhabitants)
89 Km S of Fano (60888 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
93 Km NW of L'Aquila (69753 inhabitants)
95 Km S of Pesaro (94582 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 1.0 2021-01-20
08:30:56
43.06 12.79 10 2021-01-20
08:36:40
Sala Sismica INGV-Roma 86395021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 08:30:56 ± 0.07
Latitude 43.06 ± 0.01
Longitude 12.79 ± 0.01
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 86395021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 736
Semi-minor axis of confidence ellipse (meter) 160
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 740
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.09803
Epicentral distance of station farthest from the epicenter (degree) 0.32735
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 86395021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 08:36:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-01-20T08:31:08.25 0.6 undecidable manual S 134 0.3274 50 -0.22 47
IV.MURB.HHZ. 2021-01-20T08:31:07.29 0.6 undecidable manual S 316 0.2815 50 0.18 47
IV.FDMO.HHZ. 2021-01-20T08:31:04.94 0.6 undecidable manual S 96 0.2176 112 -0.18 48
IT.MTCL.HGZ. 2021-01-20T08:31:03.37 0.6 undecidable manual S 113 0.1655 118 0.05 50
IT.GNU.HGN. 2021-01-20T08:31:03.45 0.1 undecidable manual P 212 0.3031 50 0.63 84
IV.ATCC.EHZ. 2021-01-20T08:31:03.36 0.6 undecidable manual S 319 0.1673 118 -0.01 50
IV.MURB.HHZ. 2021-01-20T08:31:02.32 0.3 negative manual P 316 0.2815 50 -0.12 72
IV.NRCA.HHZ. 2021-01-20T08:31:02.89 0.3 undecidable manual P 134 0.3274 50 -0.34 68
IV.MOMA.HNE. 2021-01-20T08:31:02.52 0.1 undecidable manual P 212 0.3031 50 -0.29 92
IV.FOSV.HNZ. 2021-01-20T08:31:01.67 0.1 undecidable manual P 355 0.2356 50 0 99
IV.FDMO.HHZ. 2021-01-20T08:31:01.27 0.6 positive manual P 96 0.2176 112 -0.03 49
IV.CESI.HHZ. 2021-01-20T08:31:01.27 0.6 undecidable manual S 124 0.0989 132 0.05 50
IV.ATCC.EHZ. 2021-01-20T08:31:00.30 0.1 negative manual P 319 0.1673 118 0.02 100
IV.ASSB.HHZ. 2021-01-20T08:31:00.82 0.6 undecidable manual S 260 0.098 132 -0.37 47
IT.MTCL.HGZ. 2021-01-20T08:31:00.65 0.6 undecidable manual P 113 0.1655 118 0.4 46
IV.ASSB.HHZ. 2021-01-20T08:30:59.00 0.3 positive manual P 260 0.098 132 -0.03 76
IV.CESI.HHZ. 2021-01-20T08:30:59.20 0.3 undecidable manual P 124 0.0989 132 0.16 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.5 0.0003625 0.1 AML other m 2021-01-20T08:31:01.19
IV.ASSB.HHE. ML:1.4 0.00028 0.1 AML other m 2021-01-20T08:31:01.26
IV.CESI.HHE. ML:0.8 7.53E-5 0.1 AML other m 2021-01-20T08:31:01.70
IV.CESI.HHN. ML:0.9 9.435E-5 1.52 AML other m 2021-01-20T08:31:02.78
IV.ATCC.EHE. ML:1.2 0.0001315 0.14 AML other m 2021-01-20T08:31:03.66
IV.ATCC.EHN. ML:1.1 0.00011 0.68 AML other m 2021-01-20T08:31:03.48
IV.FDMO.HHE. ML:0.5 1.96E-5 0.82 AML other m 2021-01-20T08:31:05.24
IV.FDMO.HHN. ML:0.5 2.245E-5 0.4 AML other m 2021-01-20T08:31:05.60
IV.NRCA.HHN. ML:1 3.335E-5 0.34 AML other m 2021-01-20T08:31:08.64
IV.NRCA.HHE. ML:0.9 3.015E-5 1.3 AML other m 2021-01-20T08:31:09.20
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