Earthquake with magnitude of ML 1.1 on date 23-08-2021 and time 16:42:53 (Italy) in region 9 km SW Serravalle di Chienti (MC)

A magnitude ML 1.1 earthquake occured in region: 9 km SW Serravalle di Chienti (MC), on

  • 23-08-2021 14:42:53 (UTC)
  • 23-08-2021 16:42:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.016, 12.878 at 3 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
Serravalle di Chienti MC 9 1070 1070
Monte Cavallo MC 10 145 1215
Valtopina PG 11 1398 2613
Nocera Umbra PG 13 5839 8452
Pieve Torina MC 15 1458 9910
Sellano PG 15 1079 10989
Muccia MC 16 915 11904
Foligno PG 16 57155 69059
Sefro MC 16 422 69481
Spello PG 17 8645 78126
Fiordimonte MC 17 202 78328
Pievebovigliana MC 18 866 79194
Trevi PG 19 8469 87663
Visso MC 20 1107 88770
Fiuminata MC 20 1402 90172

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
54 Km NE of Terni (111501 inhabitants)
78 Km NW of Teramo (54892 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
93 Km S of Fano (60888 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km S of Pesaro (94582 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 1.1 2021-08-23
14:42:53
43.0165 12.8778 3 2021-08-23
14:49:39
Sala Sismica INGV-Roma 94543011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-23 14:42:53 ± 0.13
Latitude 43.0165 ± 0.0054
Longitude 12.8778 ± 0.0061
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94543011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 200
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35253
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 94543011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-23 14:49:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-08-23T14:43:18.44 3.0 undecidable manual S -0.34 0
IV.RIBO.EHZ.01 2021-08-23T14:43:18.10 3.0 undecidable manual P 0.88 0
IV.EL6.EHZ. 2021-08-23T14:43:07.13 0.3 undecidable manual S 27 0.3525 95 -0.33 66
IV.MC2.EHZ. 2021-08-23T14:43:04.05 0.6 undecidable manual S 115 0.2509 97 0.51 43
IV.NRCA.HHZ. 2021-08-23T14:43:03.51 0.3 undecidable manual S 137 0.2518 96 -0.08 71
IV.CSP1.EHZ. 2021-08-23T14:43:03.72 0.3 undecidable manual S 72 0.25 97 0.18 69
IV.EL6.EHZ. 2021-08-23T14:43:01.19 0.1 undecidable manual P 27 0.3525 95 -0.5 84
IV.ASSB.HHZ. 2021-08-23T14:43:00.49 0.3 undecidable manual S 279 0.1619 100 0.32 68
IV.CSP1.EHZ. 2021-08-23T14:42:59.71 0.1 undecidable manual P 72 0.25 97 0.28 90
IV.NRCA.HHZ. 2021-08-23T14:42:59.10 0.1 undecidable manual P 137 0.2518 96 -0.36 89
IV.MC2.EHZ. 2021-08-23T14:42:59.77 1.0 positive manual P 115 0.2509 97 0.33 22
IV.MML1.EHZ. 2021-08-23T14:42:58.80 0.3 undecidable manual S 35 0.1187 104 0.27 70
IV.ASSB.HHZ. 2021-08-23T14:42:57.45 0.1 undecidable manual P 279 0.1619 100 -0.04 97
IV.FDMO.HHZ. 2021-08-23T14:42:57.30 0.1 undecidable manual P 83 0.1547 100 -0.02 97
IV.MML1.EHZ. 2021-08-23T14:42:56.64 0.1 undecidable manual P 35 0.1187 104 0.1 96
IV.CESI.HHZ. 2021-08-23T14:42:55.12 0.1 undecidable manual S 121 0.0225 141 -0.12 98
IV.CESI.HHZ. 2021-08-23T14:42:54.64 0.1 undecidable manual P 121 0.0225 141 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0 0.0011053297 0.16 AML other m 2021-08-23T14:42:55.24
IV.CESI.HNN. ML:0 0.0010994012 0.1792 AML other m 2021-08-23T14:42:55.25
IV.CESI.HHE. ML:0 0.0015090935 0.0832 AML other m 2021-08-23T14:42:55.25
IV.CESI.HNE. ML:0 0.001302723 0.0704 AML other m 2021-08-23T14:42:55.22
IV.MML1.EHE. ML:0.9 0.00010386973 0.1152 AML other m 2021-08-23T14:42:59.67
IV.ASSB.HHE. ML:0.9 8.0024625E-5 0.1408 AML other m 2021-08-23T14:43:01.23
IV.MML1.EHN. ML:0.8 8.6579215E-5 0.16 AML other m 2021-08-23T14:43:00.14
IV.ASSB.HHN. ML:0.9 7.389323E-5 0.2048 AML other m 2021-08-23T14:43:01.64
IV.NRCA.HHE. ML:1 6.245E-5 0.12 AML other m 2021-08-23T14:43:04.22
IV.NRCA.HHN. ML:1.1 6.961911E-5 0.1408 AML other m 2021-08-23T14:43:06.04
IV.MML1.HNE. ML:0.9 0.000116033275 0.1408 AML other m 2021-08-23T14:42:59.65
IV.MML1.HNN. ML:0.9 0.0001023013 0.2432 AML other m 2021-08-23T14:43:00.36
IV.FDMO.HHE. ML:1.1 0.0001301029 0.2176 AML other m 2021-08-23T14:42:59.38
IV.FDMO.HHN. ML:0.9 8.2307095E-5 0.224 AML other m 2021-08-23T14:42:58.81
IV.NRCA.HNE. ML:1.2 9.7820445E-5 0.7872 AML other m 2021-08-23T14:43:14.73
IV.NRCA.HNN. ML:1.3 0.00011645114 0.6464 AML other m 2021-08-23T14:43:10.20
IV.CSP1.EHE. ML:1.2 9.8456685E-5 0.32 AML other m 2021-08-23T14:43:06.35
IV.CSP1.EHN. ML:1.2 0.00010167754 0.1984 AML other m 2021-08-23T14:43:05.79
IV.EL6.EHE. ML:1.2 5.705581E-5 0.2432 AML other m 2021-08-23T14:43:07.94
IV.EL6.EHN. ML:1 4.122021E-5 0.1792 AML other m 2021-08-23T14:43:07.34
IV.RIBO.EHE.01 ML:2.1 6.9758675E-5 0.1792 AML other m 2021-08-23T14:43:45.46
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