Earthquake with magnitude of ML 1.6 on date 03-09-2021 and time 10:36:21 (Italy) in region 4 km SW Ortucchio (AQ)

A magnitude ML 1.6 earthquake occured in region: 4 km SW Ortucchio (AQ), on

  • 03-09-2021 08:36:21 (UTC)
  • 03-09-2021 10:36:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.938, 13.609 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
Ortucchio AQ 4 1860 1860
Collelongo AQ 6 1233 3093
Trasacco AQ 6 6246 9339
Lecce nei Marsi AQ 7 1702 11041
Gioia dei Marsi AQ 7 1989 13030
Villavallelonga AQ 8 919 13949
San Benedetto dei Marsi AQ 8 3909 17858
Pescina AQ 11 4133 21991
Luco dei Marsi AQ 12 6079 28070
Ortona dei Marsi AQ 12 542 28612
Bisegna AQ 13 223 28835
Civita d'Antino AQ 13 979 29814
San Vincenzo Valle Roveto AQ 13 2347 32161
Collarmele AQ 14 894 33055
Cerchio AQ 14 1635 34690
Morino AQ 15 1448 36138
Civitella Roveto AQ 15 3268 39406
Balsorano AQ 15 3569 42975
Aielli AQ 16 1475 44450
Canistro AQ 16 995 45445
Celano AQ 17 11017 56462
Cocullo AQ 17 230 56692
Anversa degli Abruzzi AQ 17 341 57033
Avezzano AQ 18 42515 99548
Capistrello AQ 18 5252 104800
Villalago AQ 19 568 105368

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km SE of L'Aquila (69753 inhabitants)
65 Km SW of Chieti (51815 inhabitants)
67 Km E of Tivoli (56533 inhabitants)
73 Km E of Guidonia Montecelio (88673 inhabitants)
74 Km E of Velletri (53303 inhabitants)
77 Km SW of Pescara (121014 inhabitants)
78 Km SW of Montesilvano (53738 inhabitants)
78 Km NE of Latina (125985 inhabitants)
81 Km S of Teramo (54892 inhabitants)
88 Km E of Aprilia (73446 inhabitants)
93 Km E of Roma (2864731 inhabitants)
96 Km E of Pomezia (62966 inhabitants)
98 Km NE of Anzio (54211 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 1.6 2021-09-03
08:36:21
41.9377 13.6093 11 2021-09-03
08:42:47
Sala Sismica INGV-Roma 94992741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-03 08:36:21 ± 0.06
Latitude 41.9377 ± 0.0018
Longitude 13.6093 ± 0.0024
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 94992741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 189
Semi-minor axis of confidence ellipse (meter) 183
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 179
Circular confidence region, given by single value of horizontal uncertainty (meter) 190
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.46675
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 94992741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-03 08:42:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CERT.HHZ. 2021-09-03T08:36:37.60 0.3 undecidable manual S 272 0.4667 50 -0.24 68
IV.GIUL.HHZ. 2021-09-03T08:36:37.99 0.3 undecidable manual S 215 0.4623 50 0.28 67
IV.VAGA.HHZ. 2021-09-03T08:36:37.07 3.0 negative manual P 2.41 0
IV.LPEL.HHZ. 2021-09-03T08:36:36.60 0.6 undecidable manual S 75 0.4398 50 -0.44 44
IV.T0110.HHZ. 2021-09-03T08:36:33.44 0.6 undecidable manual S 23 0.3166 50 0.04 49
IV.FAGN.HHZ. 2021-09-03T08:36:33.88 0.6 undecidable manual S 357 0.3283 50 0.14 48
IT.SULP.HGZ. 2021-09-03T08:36:32.33 0.6 undecidable manual S 58 0.2779 50 0.08 49
IV.LRP.EHZ. 2021-09-03T08:36:32.50 0.3 undecidable manual S 183 0.2905 50 -0.12 72
IV.GUAR.HHZ. 2021-09-03T08:36:31.75 0.6 undecidable manual S 237 0.2635 50 -0.06 49
IV.LPEL.HHZ. 2021-09-03T08:36:30.43 0.1 negative manual P 75 0.4398 50 -0.02 95
IV.CERT.HHZ. 2021-09-03T08:36:30.81 0.6 negative manual P 272 0.4667 50 -0.1 47
IV.INTR.HHZ. 2021-09-03T08:36:30.79 0.6 undecidable manual S 71 0.2311 50 -0.08 49
IV.GIUL.HHZ. 2021-09-03T08:36:30.82 0.1 negative manual P 215 0.4623 50 -0.01 95
IT.OPI.HGN. 2021-09-03T08:36:30.74 0.6 undecidable manual S 134 0.2302 50 -0.09 49
IV.POFI.HHZ. 2021-09-03T08:36:30.81 0.6 undecidable manual S 161 0.2329 50 -0.1 49
IV.PTQR.HHZ. 2021-09-03T08:36:29.00 0.3 undecidable manual S 299 0.1763 118 -0.17 73
IV.T0110.HHZ. 2021-09-03T08:36:28.42 0.3 positive manual P 23 0.3166 50 0.08 73
IV.FAGN.HHZ. 2021-09-03T08:36:28.75 0.6 negative manual P 357 0.3283 50 0.21 47
IV.POFI.HHZ. 2021-09-03T08:36:27.01 0.1 undecidable manual P 161 0.2329 50 0.1 98
IV.GUAR.HHZ. 2021-09-03T08:36:27.49 0.1 undecidable manual P 237 0.2635 50 0.06 98
IT.SULP.HGZ. 2021-09-03T08:36:27.77 1.0 undecidable manual P 58 0.2779 50 0.09 24
IV.LRP.EHZ. 2021-09-03T08:36:27.97 0.1 undecidable manual P 183 0.2905 50 0.07 97
IT.OPI.HGN. 2021-09-03T08:36:26.86 0.1 undecidable manual P 134 0.2302 50 0 100
IV.INTR.HHZ. 2021-09-03T08:36:26.95 0.3 positive manual P 71 0.2311 50 0.07 74
IV.PTQR.HHZ. 2021-09-03T08:36:25.95 0.1 undecidable manual P 299 0.1763 118 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHN. ML:1.4 0.000174 0.18 AML other m 2021-09-03T08:36:30.22
IV.PTQR.HHE. ML:1.4 0.000205 0.9 AML other m 2021-09-03T08:36:30.38
IV.INTR.HHE. ML:1.9 0.000454 1.42 AML other m 2021-09-03T08:36:31.16
IV.POFI.HHN. ML:1 6.055E-5 0.64 AML other m 2021-09-03T08:36:31.35
IV.INTR.HHN. ML:1.8 0.000331 0.8 AML other m 2021-09-03T08:36:32.43
IV.GUAR.HHN. ML:1.9 0.000407 0.62 AML other m 2021-09-03T08:36:32.07
IV.GUAR.HHE. ML:1.9 0.000424 1.36 AML other m 2021-09-03T08:36:32.82
IV.T0110.HHE. ML:2 0.000414 1.42 AML other m 2021-09-03T08:36:33.21
IV.POFI.HHE. ML:1.1 7.365E-5 1.22 AML other m 2021-09-03T08:36:34.98
IV.FAGN.HHN. ML:1.9 0.000288 0.54 AML other m 2021-09-03T08:36:35.60
IV.FAGN.HHE. ML:1.8 0.0002385 0.28 AML other m 2021-09-03T08:36:35.65
IV.T0110.HHN. ML:1.8 0.000282 1.46 AML other m 2021-09-03T08:36:36.96
IV.GIUL.HHN. ML:1.4 6.145E-5 0.82 AML other m 2021-09-03T08:36:38.90
IV.LPEL.HHN. ML:1.4 6.98E-5 0.62 AML other m 2021-09-03T08:36:38.53
IV.GIUL.HHE. ML:1.3 5.27E-5 0.66 AML other m 2021-09-03T08:36:39.16
IV.LPEL.HHE. ML:1.5 7.905E-5 1.08 AML other m 2021-09-03T08:36:42.73
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