Earthquake with magnitude of ML 0.5 on date 22-08-2021 and time 08:35:33 (Italy) in region 1 km E Muccia (MC)

A magnitude ML 0.5 earthquake occured in region: 1 km E Muccia (MC), on

  • 22-08-2021 06:35:33 (UTC)
  • 22-08-2021 08:35:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.082, 13.053 at 13 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
Muccia MC 1 915 915
Pievebovigliana MC 3 866 1781
Pieve Torina MC 4 1458 3239
Fiordimonte MC 6 202 3441
Camerino MC 6 6974 10415
Serravalle di Chienti MC 8 1070 11485
Fiastra MC 10 559 12044
Monte Cavallo MC 11 145 12189
Sefro MC 11 422 12611
Acquacanina MC 12 121 12732
Pioraco MC 12 1134 13866
Castelraimondo MC 14 4587 18453
Serrapetrona MC 16 966 19419
Fiuminata MC 16 1402 20821
Caldarola MC 16 1823 22644
Ussita MC 17 444 23088
Visso MC 17 1107 24195
Cessapalombo MC 17 512 24707
Bolognola MC 17 142 24849
Gagliole MC 18 620 25469
Belforte del Chienti MC 18 1886 27355
Camporotondo di Fiastrone MC 18 563 27918
San Severino Marche MC 19 12726 40644
Matelica MC 20 9981 50625

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Foligno (57155 inhabitants)
54 Km E of Perugia (166134 inhabitants)
67 Km NE of Terni (111501 inhabitants)
71 Km SW of Ancona (100861 inhabitants)
71 Km NW of Teramo (54892 inhabitants)
85 Km S of Fano (60888 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
93 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 0.5 2021-08-22
06:35:33
43.0817 13.0528 13 2021-08-22
06:41:12
Sala Sismica INGV-Roma 94485641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 06:35:33 ± 0.08
Latitude 43.0817 ± 0.0036
Longitude 13.0528 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94485641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 373
Semi-minor axis of confidence ellipse (meter) 143
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 165
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.25181
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 94485641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 06:41:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-08-22T06:35:43.22 0.6 undecidable manual S 170 0.2518 96 0.02 49
IV.EL6.EHZ. 2021-08-22T06:35:43.14 0.6 undecidable manual S 8 0.25 96 0 49
IV.MC2.EHZ. 2021-08-22T06:35:41.77 0.6 undecidable manual S 150 0.197 100 0.18 48
IV.CSP1.EHZ. 2021-08-22T06:35:39.52 0.6 undecidable manual S 85 0.1115 121 0.32 47
IV.CESI.HHZ. 2021-08-22T06:35:39.88 0.6 undecidable manual S 235 0.1331 114 0.12 49
IV.EL6.EHZ. 2021-08-22T06:35:39.05 0.6 negative manual P 8 0.25 96 0.09 48
IT.MTCL.HGZ. 2021-08-22T06:35:38.73 0.6 undecidable manual S 204 0.0962 128 -0.09 49
IV.MC2.EHZ. 2021-08-22T06:35:38.17 0.6 positive manual P 150 0.197 100 0.1 48
IV.MML1.EHZ. 2021-08-22T06:35:38.41 0.6 undecidable manual S 298 0.0674 141 0.2 48
IV.PF6.EHZ. 2021-08-22T06:35:38.85 0.6 undecidable manual S 61 0.1178 119 -0.51 45
IV.NRCA.HHZ. 2021-08-22T06:35:38.93 0.1 undecidable manual P 170 0.2518 96 -0.07 96
IV.FDMO.HHZ. 2021-08-22T06:35:37.81 0.6 undecidable manual S 151 0.0513 149 -0.14 50
IV.MML1.EHZ. 2021-08-22T06:35:36.31 0.6 undecidable manual P 298 0.0674 141 0.19 49
IV.PF6.EHZ. 2021-08-22T06:35:36.72 0.1 undecidable manual P 61 0.1178 119 -0.06 99
IV.CSP1.EHZ. 2021-08-22T06:35:36.86 0.1 negative manual P 85 0.1115 121 0.17 97
IV.CESI.HHZ. 2021-08-22T06:35:36.86 0.1 undecidable manual P 235 0.1331 114 -0.15 96
IT.MTCL.HGZ. 2021-08-22T06:35:36.50 0.1 undecidable manual P 204 0.0962 128 0.03 100
IV.FDMO.HHZ. 2021-08-22T06:35:35.80 0.1 undecidable manual P 151 0.0513 149 -0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHN. ML:0.5 3.85E-5 0.2 AML other m 2021-08-22T06:35:38.51
IV.MML1.EHE. ML:0.2 1.89E-5 0.66 AML other m 2021-08-22T06:35:38.42
IV.NRCA.HHE. ML:0.6 2.085E-5 1.04 AML other m 2021-08-22T06:35:43.46
IV.NRCA.HHN. ML:0.5 1.6046155E-5 0.0992 AML other m 2021-08-22T06:35:43.40
IV.MML1.HNE. ML:0.5 3.947934E-5 0.2592 AML other m 2021-08-22T06:35:38.94
IV.MML1.HNN. ML:0.6 4.342159E-5 0.2304 AML other m 2021-08-22T06:35:38.55
IV.CSP1.EHE. ML:0.5 3.0659315E-5 0.08 AML other m 2021-08-22T06:35:39.70
IV.CSP1.EHN. ML:0.6 3.847298E-5 0.08 AML other m 2021-08-22T06:35:39.70
IV.EL6.EHE. ML:0.6 2.078475E-5 0.1792 AML other m 2021-08-22T06:35:43.57
IV.EL6.EHN. ML:0.3 8.16023E-6 0.2624 AML other m 2021-08-22T06:35:43.43
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