Earthquake with magnitude of ML 1.2 on date 16-01-2021 and time 11:21:37 (Italy) in region 3 km S Montefalco (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km S Montefalco (PG), on

  • 16-01-2021 10:21:37 (UTC)
  • 16-01-2021 11:21:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.87, 12.66 at 8 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
Montefalco PG 3 5679 5679
Castel Ritaldi PG 5 3278 8957
Trevi PG 7 8469 17426
Giano dell'Umbria PG 8 3846 21272
Bevagna PG 8 5081 26353
Gualdo Cattaneo PG 10 6155 32508
Foligno PG 10 57155 89663
Campello sul Clitunno PG 11 2442 92105
Spello PG 14 8645 100750
Massa Martana PG 15 3770 104520
Cannara PG 15 4305 108825
Spoleto PG 16 38218 147043
Collazzone PG 18 3473 150516
Vallo di Nera PG 20 364 150880

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SW of Foligno (57155 inhabitants)
34 Km N of Terni (111501 inhabitants)
35 Km SE of Perugia (166134 inhabitants)
68 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
88 Km W of Teramo (54892 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.2 2021-01-16
10:21:37
42.87 12.66 8 2021-01-16
10:38:19
Sala Sismica INGV-Roma 86300791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-16 10:21:37 ± 0.11
Latitude 42.87 ± 0.01
Longitude 12.66 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86300791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 886
Semi-minor axis of confidence ellipse (meter) 471
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 294
Circular confidence region, given by single value of horizontal uncertainty (meter) 890
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 10
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) 0.33455
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86300791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-16 10:38:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BRES.EHZ. 2021-01-16T10:23:24.72 3.0 undecidable manual Sn -2.84 0
ST.CARE.EHZ. 2021-01-16T10:23:23.07 3.0 undecidable manual Sn -5.66 0
IT.DANT.HNZ. 2021-01-16T10:23:17.29 3.0 undecidable manual Sn -3.63 0
ST.PANI.EHZ. 2021-01-16T10:23:10.75 3.0 undecidable manual Sn -4.79 0
IV.TEOL.HHZ. 2021-01-16T10:23:08.64 3.0 undecidable manual Sg 10.74 0
GU.BLANC.HHZ. 2021-01-16T10:23:08.87 3.0 undecidable manual Pg 14.28 0
HL.VLS.HHZ. 2021-01-16T10:23:08.68 3.0 undecidable manual Pn 1.37 0
IV.SALB.HHZ. 2021-01-16T10:23:01.96 3.0 undecidable manual Sg 1.71 0
IV.GIZZ.HHZ. 2021-01-16T10:22:37.18 3.0 positive manual Pg 8.55 0
IV.SENA.HHZ. 2021-01-16T10:22:27.73 3.0 undecidable manual Pg 2.12 0
IX.STN3.HHZ.02 2021-01-16T10:22:09.60 3.0 positive manual Pg 2.18 0
IV.FIR.HHZ. 2021-01-16T10:22:01.42 3.0 undecidable manual Pn -2.23 0
IT.MCLF.HNZ. 2021-01-16T10:21:59.50 3.0 undecidable manual S -4.9 0
IV.NRCA.HHZ. 2021-01-16T10:21:51.09 1.0 undecidable manual S 96 0.3345 50 0.45 30
IV.PTRJ.HNZ. 2021-01-16T10:21:48.90 3.0 undecidable manual P -2.57 0
IV.CESI.HHZ. 2021-01-16T10:21:46.59 0.6 undecidable manual S 53 0.2239 108 -0.04 66
IV.ATCC.HNN. 2021-01-16T10:21:44.72 1.0 undecidable manual P 357 0.3157 103 -0.05 32
IV.NRCA.HHZ. 2021-01-16T10:21:44.71 0.6 undecidable manual P 96 0.3345 50 -0.41 60
IV.ASSB.HHZ. 2021-01-16T10:21:44.72 0.6 undecidable manual S 360 0.1727 112 -0.06 67
IV.CESI.HHZ. 2021-01-16T10:21:42.95 1.0 positive manual P 53 0.2239 108 0.14 32
IV.ASSB.HHZ. 2021-01-16T10:21:41.81 0.3 negative manual P 360 0.1727 112 0.07 100
IV.MOMA.HHZ. 2021-01-16T10:21:41.92 0.6 undecidable manual S 225 0.0935 127 -0.18 66
IT.GNU.HGE. 2021-01-16T10:21:40.39 1.0 undecidable manual P 225 0.0935 127 0.2 33
IV.MOMA.HHZ. 2021-01-16T10:21:40.32 0.3 undecidable manual P 225 0.0935 127 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.3 0.0002938128 0.2624 AML other m 2021-01-16T10:21:42.78
IV.MOMA.HHN. ML:1.3 0.0002535899 0.3008 AML other m 2021-01-16T10:21:42.12
IV.NRCA.HHE. ML:1.1 4.5739195E-5 0.1408 AML other m 2021-01-16T10:21:52.00
IV.NRCA.HHN. ML:0.9 3.2252565E-5 0.16 AML other m 2021-01-16T10:21:53.67
IV.PTRJ.HNE. ML:3.8 0.0013885385 0.1088 AML other m 2021-01-16T10:22:13.32
IV.PTRJ.HHE. ML:3.4 0.0005575 0.1 AML other m 2021-01-16T10:22:13.47
IV.PTRJ.HNN. ML:3.8 0.0016536985 0.096 AML other m 2021-01-16T10:22:14.28
IV.PTRJ.HHN. ML:3.8 0.001529161 0.1216 AML other m 2021-01-16T10:22:14.02
IX.STN3.HHE.02 ML:4.7 0.0038499221 0.1088 AML other m 2021-01-16T10:22:12.07
IX.STN3.HHN.02 ML:4.5 0.0026288965 0.096 AML other m 2021-01-16T10:22:11.49
IV.FIR.HNN. ML:2.9 0.00043156165 0.0704 AML other m 2021-01-16T10:22:15.99
IV.FIR.HNE. ML:3.1 0.000658 0.06 AML other m 2021-01-16T10:22:17.63
IV.MOMA.HNE. ML:1.3 0.0002808295 0.192 AML other m 2021-01-16T10:21:42.68
IV.MOMA.HNN. ML:1.3 0.000272601 0.3008 AML other m 2021-01-16T10:21:42.12
IV.ASSB.HHE. ML:0.8 4.9767205E-5 0.1024 AML other m 2021-01-16T10:21:45.50
IV.ASSB.HHN. ML:0.9 6.018836E-5 1.1648 AML other m 2021-01-16T10:22:00.12
IV.CESI.HHE. ML:0.9 4.913243E-5 1.6192 AML other m 2021-01-16T10:22:05.84
IV.CESI.HHN. ML:0.8 3.81006E-5 1.2416 AML other m 2021-01-16T10:22:01.96
IV.CESI.HNE. ML:1.4 0.0001583165 0.8832 AML other m 2021-01-16T10:21:55.52
IV.CESI.HNN. ML:1.4 0.00016574525 0.768 AML other m 2021-01-16T10:21:58.62
IV.FIR.HHE. ML:3.1 0.00073303925 0.0576 AML other m 2021-01-16T10:22:17.63
IV.FIR.HHN. ML:3 0.00046375895 0.0832 AML other m 2021-01-16T10:22:15.99
IV.SENA.HHE. ML:3.2 0.000100178595 2.016 AML other m 2021-01-16T10:23:16.14
IV.SENA.HHN. ML:3.3 0.00014489255 2.5408 AML other m 2021-01-16T10:23:41.69
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download