Earthquake with magnitude of ML 0.8 on date 28-09-2021 and time 03:17:00 (Italy) in region 5 km W Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 5 km W Sellano (PG), on

  • 28-09-2021 01:17:00 (UTC)
  • 28-09-2021 03:17:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.902, 12.865 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
Sellano PG 5 1079 1079
Trevi PG 10 8469 9548
Cerreto di Spoleto PG 10 1075 10623
Campello sul Clitunno PG 11 2442 13065
Foligno PG 14 57155 70220
Preci PG 15 724 70944
Vallo di Nera PG 15 364 71308
Monte Cavallo MC 15 145 71453
Montefalco PG 17 5679 77132
Castel Ritaldi PG 18 3278 80410
Visso MC 19 1107 81517
Spello PG 19 8645 90162
Sant'Anatolia di Narco PG 19 564 90726
Valtopina PG 20 1398 92124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
45 Km SE of Perugia (166134 inhabitants)
74 Km W of Teramo (54892 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 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 0.8 2021-09-28
01:17:00
42.9018 12.8648 11 2021-09-28
01:24:50
Sala Sismica INGV-Roma 95969111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 01:17:00 ± 0.06
Latitude 42.9018 ± 0.0027
Longitude 12.8648 ± 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 95969111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 250
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
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) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.35703
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:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 95969111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 01:24:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2021-09-28T01:17:13.82 0.3 undecidable manual S 9 0.357 50 0 71
IV.ATCC.EHZ. 2021-09-28T01:17:13.22 0.3 undecidable manual S 330 0.3274 50 0.29 70
IV.CSP1.EHZ. 2021-09-28T01:17:12.67 0.3 undecidable manual S 53 0.313 50 0.17 73
IV.MML1.EHZ. 2021-09-28T01:17:09.96 0.3 undecidable manual S 20 0.2257 50 0.05 74
IV.GAVE.EHZ. 2021-09-28T01:17:09.40 0.3 undecidable manual S 174 0.2104 50 -0.07 73
IV.ASSB.HHZ. 2021-09-28T01:17:09.02 0.3 undecidable manual S 313 0.2059 50 -0.32 69
IV.FDMO.HHZ. 2021-09-28T01:17:09.28 0.3 undecidable manual S 50 0.2113 50 -0.21 70
IV.SNTG.HHZ. 2021-09-28T01:17:08.23 0.1 undecidable manual P 9 0.357 50 -0.07 94
IV.NRCA.HHZ. 2021-09-28T01:17:08.94 0.3 undecidable manual S 110 0.1952 50 -0.07 72
IV.ATCC.EHZ. 2021-09-28T01:17:07.81 0.1 undecidable manual P 330 0.3274 50 0.02 97
IT.MTCL.HGE. 2021-09-28T01:17:07.00 0.3 undecidable manual S 47 0.1349 50 -0.22 73
IV.CSP1.EHZ. 2021-09-28T01:17:07.63 0.1 undecidable manual P 53 0.313 50 0.09 98
IV.FEMA.HNE. 2021-09-28T01:17:07.71 0.3 undecidable manual S 66 0.1484 50 0.09 74
IV.CESI.HHZ. 2021-09-28T01:17:06.37 0.3 undecidable manual S 16 0.107 133 -0.04 76
IV.MML1.EHZ. 2021-09-28T01:17:06.05 0.1 undecidable manual P 20 0.2257 50 0 98
IV.FDMO.HHZ. 2021-09-28T01:17:05.80 0.1 undecidable manual P 50 0.2113 50 0 98
IV.GAVE.EHZ. 2021-09-28T01:17:05.90 0.1 undecidable manual P 174 0.2104 50 0.1 98
IV.NRCA.HHZ. 2021-09-28T01:17:05.58 0.1 undecidable manual P 110 0.1952 50 0.05 100
IV.ASSB.HHZ. 2021-09-28T01:17:05.63 0.1 undecidable manual P 313 0.2059 50 -0.09 97
IV.FEMA.HNE. 2021-09-28T01:17:04.57 0.1 undecidable manual P 66 0.1484 50 -0.16 98
IV.CESI.HHZ. 2021-09-28T01:17:04.22 0.1 undecidable manual P 16 0.107 133 0.19 97
IT.MTCL.HGE. 2021-09-28T01:17:04.64 0.1 undecidable manual P 47 0.1349 50 0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0002945 0.24 AML other m 2021-09-28T01:17:06.88
IV.CESI.HHE. ML:1.2 0.0001735 0.14 AML other m 2021-09-28T01:17:06.80
IV.CSP1.EHE. ML:1 4.3785E-5 0.42 AML other m 2021-09-28T01:17:07.15
IV.NRCA.HHN. ML:0.7 3.52E-5 0.14 AML other m 2021-09-28T01:17:09.10
IV.ASSB.HHE. ML:0.6 2.63E-5 0.6 AML other m 2021-09-28T01:17:09.60
IV.ASSB.HHN. ML:0.6 2.595E-5 1.06 AML other m 2021-09-28T01:17:09.29
IV.FDMO.HHE. ML:0.7 3.145E-5 0.1 AML other m 2021-09-28T01:17:10.01
IV.NRCA.HHE. ML:0.6 2.27E-5 0.6 AML other m 2021-09-28T01:17:10.46
IV.FDMO.HHN. ML:0.6 2.385E-5 1.1 AML other m 2021-09-28T01:17:10.31
IV.MML1.EHN. ML:0.6 2.345E-5 0.18 AML other m 2021-09-28T01:17:10.36
IV.MML1.EHE. ML:0.5 2.125E-5 0.9 AML other m 2021-09-28T01:17:11.28
IV.CSP1.EHN. ML:1 4.73E-5 1.2 AML other m 2021-09-28T01:17:14.01
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