Earthquake with magnitude of ML 1.1 on date 27-09-2021 and time 06:43:43 (Italy) in region 11 km E Foligno (PG)

A magnitude ML 1.1 earthquake occured in region: 11 km E Foligno (PG), on

  • 27-09-2021 04:43:43 (UTC)
  • 27-09-2021 06:43:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.966, 12.834 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
Foligno PG 11 57155 57155
Sellano PG 11 1079 58234
Trevi PG 12 8469 66703
Valtopina PG 12 1398 68101
Spello PG 14 8645 76746
Monte Cavallo MC 14 145 76891
Serravalle di Chienti MC 15 1070 77961
Nocera Umbra PG 17 5839 83800
Montefalco PG 17 5679 89479
Campello sul Clitunno PG 17 2442 91921
Cerreto di Spoleto PG 18 1075 92996
Bevagna PG 19 5081 98077
Preci PG 19 724 98801
Pieve Torina MC 20 1458 100259

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km E of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
48 Km NE of Terni (111501 inhabitants)
79 Km W of Teramo (54892 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
99 Km S of Fano (60888 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-09-27
04:43:43
42.966 12.8338 11 2021-09-27
04:49:33
Sala Sismica INGV-Roma 95926211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 04:43:43 ± 0.05
Latitude 42.9660 ± 0.0027
Longitude 12.8338 ± 0.0037
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 95926211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 319
Semi-minor axis of confidence ellipse (meter) 299
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
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) 0.06475
Epicentral distance of station farthest from the epicenter (degree) 0.41189
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95926211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 04:49:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-09-27T04:43:58.36 0.6 undecidable manual S 28 0.4119 50 0.48 43
IV.SNTG.HHZ. 2021-09-27T04:43:54.12 0.6 undecidable manual S 15 0.2995 50 -0.41 45
IV.ATCC.EHZ. 2021-09-27T04:43:53.57 0.6 undecidable manual S 327 0.2608 50 0.18 47
IV.GAVE.EHZ. 2021-09-27T04:43:53.80 0.6 undecidable manual S 171 0.277 50 -0.08 48
IV.NRCA.HHZ. 2021-09-27T04:43:52.80 0.6 undecidable manual S 123 0.2446 50 -0.1 48
IV.FDMO.HHZ. 2021-09-27T04:43:51.36 0.6 undecidable manual S 69 0.1979 50 -0.18 48
IV.EL6.EHZ. 2021-09-27T04:43:51.75 0.3 positive manual P 28 0.4119 50 0.11 70
IV.MML1.EHZ. 2021-09-27T04:43:50.78 0.6 undecidable manual S 34 0.1781 118 -0.16 48
IV.SNTG.HHZ. 2021-09-27T04:43:49.57 0.3 undecidable manual P 15 0.2995 50 -0.14 71
IT.MTCL.HGN. 2021-09-27T04:43:49.00 0.6 undecidable manual S 77 0.1241 128 -0.18 49
IV.ASSB.HHZ. 2021-09-27T04:43:49.69 0.6 undecidable manual S 301 0.1493 123 -0.28 48
IV.ATCC.EHZ. 2021-09-27T04:43:49.09 0.3 negative manual P 327 0.2608 50 0.04 73
IV.GAVE.EHZ. 2021-09-27T04:43:49.40 1.0 negative manual P 171 0.277 50 0.07 24
IV.MOMA.HNE. 2021-09-27T04:43:48.95 0.1 undecidable manual P 230 0.2518 50 0.05 98
IV.FDMO.HHZ. 2021-09-27T04:43:48.00 0.1 positive manual P 69 0.1979 50 0.02 99
IV.NRCA.HHZ. 2021-09-27T04:43:48.73 0.1 undecidable manual P 123 0.2446 50 -0.04 98
IV.MML1.EHZ. 2021-09-27T04:43:47.64 0.1 positive manual P 34 0.1781 118 0 100
IV.CESI.HHZ. 2021-09-27T04:43:47.64 0.6 undecidable manual S 53 0.0648 146 0.04 51
IV.ASSB.HHZ. 2021-09-27T04:43:47.04 0.1 negative manual P 301 0.1493 123 -0.04 100
IT.MTCL.HGN. 2021-09-27T04:43:46.73 0.1 undecidable manual P 77 0.1241 128 0.11 99
IV.CESI.HHZ. 2021-09-27T04:43:45.92 0.1 positive manual P 53 0.0648 146 0.21 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.0003515 0.24 AML other m 2021-09-27T04:43:47.85
IV.CESI.HHN. ML:1.3 0.0002745 1.68 AML other m 2021-09-27T04:43:47.03
IV.ASSB.HHN. ML:1.3 0.0001565 1.84 AML other m 2021-09-27T04:43:50.97
IV.ASSB.HHE. ML:1 9.48E-5 0.1 AML other m 2021-09-27T04:43:50.09
IV.MML1.EHN. ML:0.8 5.21E-5 0.18 AML other m 2021-09-27T04:43:51.25
IV.MML1.EHE. ML:1 6.45E-5 0.74 AML other m 2021-09-27T04:43:51.92
IV.FDMO.HHN. ML:0.9 5.4E-5 0.68 AML other m 2021-09-27T04:43:51.56
IV.FDMO.HHE. ML:0.8 4.19E-5 1.76 AML other m 2021-09-27T04:43:51.91
IV.ATCC.EHE. ML:1.1 6.42E-5 0.26 AML other m 2021-09-27T04:43:53.66
IV.ATCC.EHN. ML:1.2 7.025E-5 1.36 AML other m 2021-09-27T04:43:54.68
IV.GAVE.EHN. ML:1.5 0.000137 0.3 AML other m 2021-09-27T04:43:54.54
IV.GAVE.EHE. ML:1.6 0.000168 0.16 AML other m 2021-09-27T04:43:54.55
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