Earthquake with magnitude of ML 0.8 on date 21-09-2021 and time 14:42:55 (Italy) in region 1 km SW Serra San Quirico (AN)

A magnitude ML 0.8 earthquake occured in region: 1 km SW Serra San Quirico (AN), on

  • 21-09-2021 12:42:55 (UTC)
  • 21-09-2021 14:42:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.44, 13.002 at 7 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
Serra San Quirico AN 2 2850 2850
Mergo AN 5 1037 3887
Genga AN 5 1797 5684
Rosora AN 7 1985 7669
Arcevia AN 8 4612 12281
Castelplanio AN 9 3540 15821
Cupramontana AN 9 4756 20577
Poggio San Vicino MC 10 246 20823
Poggio San Marcello AN 10 693 21516
Maiolati Spontini AN 10 6248 27764
Montecarotto AN 11 1987 29751
Sassoferrato AN 12 7285 37036
Apiro MC 12 2280 39316
Serra de' Conti AN 12 3746 43062
Monte Roberto AN 12 3061 46123
Castelbellino AN 13 4947 51070
Cerreto d'Esi AN 13 3817 54887
Fabriano AN 14 31480 86367
San Paolo di Jesi AN 14 933 87300
Staffolo AN 15 2253 89553
Barbara AN 16 1368 90921
San Lorenzo in Campo PU 19 3414 94335
Ostra Vetere AN 19 3311 97646
Castelleone di Suasa AN 19 1676 99322
Cingoli MC 19 10352 109674
Pergola PU 19 6333 116007
Serra Sant'Abbondio PU 19 1027 117034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km S of Fano (60888 inhabitants)
46 Km W of Ancona (100861 inhabitants)
53 Km S of Pesaro (94582 inhabitants)
59 Km NE of Foligno (57155 inhabitants)
62 Km NE of Perugia (166134 inhabitants)
78 Km SE of Rimini (147750 inhabitants)
90 Km E of Arezzo (99543 inhabitants)
99 Km SE of Cesena (96758 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 0.8 2021-09-21
12:42:55
43.4402 13.0018 7 2021-09-21
13:23:02
Sala Sismica INGV-Roma 95698841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 12:42:55 ± 0.08
Latitude 43.4402 ± 0.0036
Longitude 13.0018 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95698841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 318
Semi-minor axis of confidence ellipse (meter) 305
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
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) 152
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44067
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 95698841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 13:23:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HNE. 2021-09-21T12:43:11.63 0.3 undecidable manual S 189 0.4407 50 0.05 69
IV.ATBU.EHZ. 2021-09-21T12:43:08.10 0.3 undecidable manual S 276 0.331 100 0.08 70
IV.ATSC.EHE. 2021-09-21T12:43:04.04 0.3 undecidable manual S 266 0.2293 105 -0.16 71
IV.CESI.HNE. 2021-09-21T12:43:04.71 1.0 undecidable manual P 189 0.4407 50 0.11 23
IV.PP3.EHZ. 2021-09-21T12:43:03.69 3.0 undecidable manual P 0
IV.FRON.EHZ. 2021-09-21T12:43:03.85 0.3 undecidable manual S 291 0.2149 105 0.2 70
IV.SNTG.HHZ. 2021-09-21T12:43:02.84 0.3 undecidable manual S 194 0.1907 107 0.09 72
IV.ATBU.EHZ. 2021-09-21T12:43:02.93 0.1 undecidable manual P 276 0.331 100 0.38 88
IV.MML1.EHE. 2021-09-21T12:43:02.15 1.0 undecidable manual P 184 0.3274 100 -0.32 22
IV.SSFR.HHZ. 2021-09-21T12:43:01.59 0.3 undecidable manual S 269 0.1592 110 -0.03 74
IV.CING.HHZ. 2021-09-21T12:43:01.62 0.3 undecidable manual S 115 0.1547 111 0.17 72
IV.FRON.EHZ. 2021-09-21T12:43:00.14 0.3 undecidable manual P 291 0.2149 105 0.12 72
IV.EL6.EHZ. 2021-09-21T12:43:00.87 0.6 undecidable manual S 147 0.1322 114 0.21 48
IV.ATSC.EHE. 2021-09-21T12:43:00.00 0.1 undecidable manual P 266 0.2293 105 -0.34 91
IV.MPAG.EHZ. 2021-09-21T12:43:00.80 0.1 undecidable manual P 317 0.2581 103 -0.15 94
IV.SNTG.HHZ. 2021-09-21T12:42:59.35 0.3 undecidable manual P 194 0.1907 107 -0.15 71
IV.CING.HHZ. 2021-09-21T12:42:58.67 0.1 undecidable manual P 115 0.1547 111 -0.08 97
IV.ARVD.HHZ. 2021-09-21T12:42:58.70 0.1 undecidable manual S 323 0.0728 129 0.02 100
IV.EL6.EHZ. 2021-09-21T12:42:58.18 0.1 undecidable manual P 147 0.1322 114 -0.12 97
IV.SSFR.HHZ. 2021-09-21T12:42:58.89 0.3 undecidable manual P 269 0.1592 110 0.04 74
IV.ARVD.HHZ. 2021-09-21T12:42:57.10 0.1 undecidable manual P 323 0.0728 129 -0.05 99
IV.MMUR.HNZ. 2021-09-21T12:42:56.09 3.0 undecidable manual S 0
IV.MMUR.HNZ. 2021-09-21T12:42:55.80 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.8 4.704018E-5 0.384 AML other m 2021-09-21T12:43:03.20
IV.SNTG.HHN. ML:0.9 5.97E-5 0.4 AML other m 2021-09-21T12:43:03.32
IV.MMUR.HNE. ML:2.5 0.006404279 0.3584 AML other m 2021-09-21T12:42:56.38
IV.MMUR.HNN. ML:2.2 0.0033744465 0.0704 AML other m 2021-09-21T12:42:56.17
IV.ARVD.HHE. ML:0.8 0.00010483213 0.3008 AML other m 2021-09-21T12:43:00.48
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