Earthquake with magnitude of ML 0.9 on date 21-02-2021 and time 14:09:42 (Italy) in region 3 km S Assisi (PG)

A magnitude ML 0.9 earthquake occured in region: 3 km S Assisi (PG), on

  • 21-02-2021 13:09:42 (UTC)
  • 21-02-2021 14:09:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.04, 12.62 at 9 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
Assisi PG 3 28299 28299
Cannara PG 6 4305 32604
Bastia Umbra PG 6 21874 54478
Spello PG 7 8645 63123
Bettona PG 11 4367 67490
Valtopina PG 11 1398 68888
Foligno PG 12 57155 126043
Bevagna PG 12 5081 131124
Valfabbrica PG 13 3389 134513
Torgiano PG 15 6725 141238
Gualdo Cattaneo PG 15 6155 147393
Nocera Umbra PG 16 5839 153232
Montefalco PG 17 5679 158911
Deruta PG 17 9669 168580
Perugia PG 20 166134 334714

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NW of Foligno (57155 inhabitants)
20 Km E of Perugia (166134 inhabitants)
53 Km N of Terni (111501 inhabitants)
76 Km SE of Arezzo (99543 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Fano (60888 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
98 Km W of Teramo (54892 inhabitants)
100 Km S of Pesaro (94582 inhabitants)
100 Km NW of L'Aquila (69753 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 0.9 2021-02-21
13:09:42
43.04 12.62 9 2021-02-21
13:23:12
Sala Sismica INGV-Roma 87355831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-21 13:09:42 ± 0.05
Latitude 43.04 ± 0.00
Longitude 12.62 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87355831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 354
Semi-minor axis of confidence ellipse (meter) 150
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 100
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 87355831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-21 13:23:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-21T13:09:59.02 0.3 undecidable manual S 51 0.4551 50 0.28 66
IV.ATPI.EHZ. 2021-02-21T13:09:57.04 3.0 undecidable manual S -1.01 0
IV.OFFI.HHZ. 2021-02-21T13:09:56.38 3.0 undecidable manual Pn -0.69 0
IV.MGAB.HHN. 2021-02-21T13:09:56.59 0.3 undecidable manual S 251 0.3912 50 -0.24 68
IV.CAFI.HHZ. 2021-02-21T13:09:56.62 3.0 undecidable manual S -1.2 0
IV.FDMO.HHZ. 2021-02-21T13:09:55.20 0.6 undecidable manual S 91 0.3435 50 -0.22 46
IV.FOSV.EHZ. 2021-02-21T13:09:52.95 0.3 undecidable manual S 22 0.2743 106 -0.24 69
IV.MOMA.HHZ. 2021-02-21T13:09:52.08 0.3 undecidable manual S 188 0.2401 108 0.14 71
IV.EL6.EHZ. 2021-02-21T13:09:51.61 0.1 undecidable manual P 51 0.4551 50 -0.15 91
IV.CESI.HHZ. 2021-02-21T13:09:51.12 0.3 undecidable manual S 100 0.2131 110 0.16 71
IV.MURB.HHZ. 2021-02-21T13:09:51.96 0.6 undecidable manual S 343 0.2311 108 0.34 46
IV.MGAB.HHN. 2021-02-21T13:09:50.71 0.3 undecidable manual P 251 0.3912 50 0.05 71
IV.FDMO.HHZ. 2021-02-21T13:09:49.90 0.3 undecidable manual P 91 0.3435 50 0.05 71
IV.ATCC.EHZ. 2021-02-21T13:09:48.60 0.1 undecidable manual S 7 0.1448 118 0.07 98
IV.FOSV.EHZ. 2021-02-21T13:09:48.27 0.3 undecidable manual P 22 0.2743 106 -0.28 69
IV.MURB.HHZ. 2021-02-21T13:09:47.69 0.3 undecidable manual P 343 0.2311 108 0.04 73
IV.MOMA.HHZ. 2021-02-21T13:09:47.87 0.1 undecidable manual P 188 0.2401 108 0.04 97
IV.CESI.HHZ. 2021-02-21T13:09:47.31 0.1 undecidable manual P 100 0.2131 110 0.04 98
IV.ATCC.EHZ. 2021-02-21T13:09:46.02 0.1 positive manual P 7 0.1448 118 0.15 97
IV.ASSB.HHZ. 2021-02-21T13:09:45.12 0.1 undecidable manual S 88 0.0306 158 -0.29 96
IV.ASSB.HHZ. 2021-02-21T13:09:44.16 0.1 undecidable manual P 88 0.0306 158 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0 0.0005355 0.2 AML other m 2021-02-21T13:09:45.27
IV.ASSB.HHN. ML:0 0.0004645 0.2 AML other m 2021-02-21T13:09:45.17
IV.ATCC.EHE. ML:0.9 8.195E-5 0.18 AML other m 2021-02-21T13:09:48.79
IV.ATCC.EHN. ML:1 8.31E-5 0.34 AML other m 2021-02-21T13:09:48.78
IV.CESI.HHE. ML:0.9 4.8E-5 0.98 AML other m 2021-02-21T13:09:51.77
IV.CESI.HHN. ML:0.8 4.085E-5 1 AML other m 2021-02-21T13:09:52.55
IV.MURB.HHE. ML:1.4 0.0001665 0.28 AML other m 2021-02-21T13:09:52.59
IV.MOMA.HHN. ML:0.8 3.59E-5 0.26 AML other m 2021-02-21T13:09:52.93
IV.MURB.HHN. ML:1.3 0.000124 0.4 AML other m 2021-02-21T13:09:53.03
IV.MOMA.HHE. ML:0.8 4.16E-5 0.54 AML other m 2021-02-21T13:09:53.60
IV.ATPI.EHE. ML:0.9 1.938E-5 0.42 AML other m 2021-02-21T13:09:58.43
IV.ATPI.EHN. ML:0.9 2.225E-5 1.4 AML other m 2021-02-21T13:09:59.72
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